SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                ----------------

                                  SCHEDULE 13D
                                 (Rule 13d-101)

            INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                           (Amendment No. __________ )


                               GASCO ENERGY, INC.
--------------------------------------------------------------------------------
                                (Name of Issuer)


                     Common Stock, par value $0.01 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    367220100
--------------------------------------------------------------------------------
                                 (CUSIP Number)
                                Russell Cleveland
                  8080 N. Central Expressway, Suite 210, LB-59
                              Dallas, TX 75206-1857
                                  214-891-8294
--------------------------------------------------------------------------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)


                                October 15, 2003
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of This Statement)

     If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the
following box [_].


          Note: Schedules filed in paper format shall include a signed original
     and five copies of the schedule, including all exhibits. See Rule 13d-7 for
     other parties to whom copies are to be sent.

                         (Continued on following pages)
                                (Page 1 of Pages)

----------
(1)  The remainder of this cover page shall be filled out for a reporting
     person's initial filing on this form with respect to the subject class of
     securities, and for any subsequent amendment containing information which
     would alter disclosures provided in a prior cover page.

     The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).






CUSIP No. 367220100                    13D                   Page 2 of __ Pages


--------------------------------------------------------------------------------
1    NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     BFS US Special Opportunities Trust PLC
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a) [_] (b) [X]

--------------------------------------------------------------------------------
3    SEC USE ONLY



--------------------------------------------------------------------------------
4    SOURCE OF FUNDS*


     WC
--------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]



--------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION


     United Kingdom
--------------------------------------------------------------------------------
               7    SOLE VOTING POWER

  NUMBER OF
                    4,083,332
   SHARES      _________________________________________________________________
               8    SHARED VOTING POWER
BENEFICIALLY

  OWNED BY          None
               -----------------------------------------------------------------
    EACH       9    SOLE DISPOSITIVE POWER

  REPORTING
                    4,083,332
   PERSON      _________________________________________________________________
               10   SHARED DISPOSITIVE POWER
    WITH

                    None
--------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


     4,083,332
--------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

                                                                      [-]

--------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


     9.0%
--------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*


     IV
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



CUSIP No. 367220100                    13D                   Page 3 of __ Pages


--------------------------------------------------------------------------------
1    NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)


     Renaissance Capital Growth & Income Fund III, Inc.
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a) [_] (b) [X]

--------------------------------------------------------------------------------
3    SEC USE ONLY



--------------------------------------------------------------------------------
4    SOURCE OF FUNDS*


     WC
--------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]



--------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION


     Texas
--------------------------------------------------------------------------------
               7    SOLE VOTING POWER

  NUMBER OF
                    2,041,667
   SHARES      _________________________________________________________________
               8    SHARED VOTING POWER
BENEFICIALLY

  OWNED BY          None
               -----------------------------------------------------------------
    EACH       9    SOLE DISPOSITIVE POWER

  REPORTING
                    2,041,667
   PERSON      _________________________________________________________________
               10   SHARED DISPOSITIVE POWER
    WITH

                    None
--------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


     2,041,667
--------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

                                                                      [-]

--------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


     4.5%
--------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*


     IV
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



CUSIP No. 367220100                    13D                   Page 4 of __ Pages


--------------------------------------------------------------------------------
1    NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)


     Renaissance US Growth Investment Trust PLC
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a) [_] (b) [X]

--------------------------------------------------------------------------------
3    SEC USE ONLY



--------------------------------------------------------------------------------
4    SOURCE OF FUNDS*


     WC
--------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                   [_]



--------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION


     United Kingdom
--------------------------------------------------------------------------------
               7    SOLE VOTING POWER

  NUMBER OF
                    2,041,668
   SHARES      _________________________________________________________________
               8    SHARED VOTING POWER
BENEFICIALLY
                    None
  OWNED BY
               -----------------------------------------------------------------
    EACH       9    SOLE DISPOSITIVE POWER

  REPORTING
                    2,041,668
   PERSON      _________________________________________________________________
               10   SHARED DISPOSITIVE POWER
    WITH

                    None
--------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


     2,041,668
--------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

                                                                      [-]

--------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)


     4.5%
--------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*


     IV
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 367220100                   13D                   Page 5 of __ Pages


--------------------------------------------------------------------------------
Item 1.  Security and Issuer.

     This  statement  relates to the  common  stock,  par value  $0.01 per share
("Common Shares") of Gasco Energy, Inc. (the "Company"). The principal executive
offices of the Company  are located at 14  Inverness  Drive East,  Suite  H-236,
Englewood, Colorado 80112.

--------------------------------------------------------------------------------
Item 2.  Identity and Background.

     (a) This statement is filed by BFS US Special  Opportunities Trust PLC (BFS
US),  Renaissance Capital Growth and Income Fund III, Inc.  ("Renaissance III"),
and Renaissance US Growth Investment Trust PLC ("Renaissance US") (collectively,
the "Reporting Persons").

     (b) BFS US is an investment  trust  organized under the laws of England and
Wales.  Its  address  in the  United  States is c/o RENN  Capital  Group,  Inc.,
Investment Adviser, 8080 N. Central Expressway,  Suite 210, LB-59, Dallas, Texas
75206-1857.

     Renaissance  III is a  business  development  company  regulated  under the
Investment Company Act of 1940, as amended,  and organized under the laws of the
State of Texas,  with its  principal  business and  principal  office at 8080 N.
Central Expressway, Suite 210, LB-59, Dallas, Texas 75206-1857.

     Renaissance US is an investment  trust  organized under the laws of England
and Wales.  Its address in the United  States is c/o RENN Capital  Group,  Inc.,
Investment Manager, 8080 N. Central Expressway,  Suite 210, LB-59, Dallas, Texas
75206-1857.

     RENN Capital Group, Inc. ("RCG") is a corporation  organized under the laws
of the State of Texas, with its principal  business and principal office at 8080
N. Central  Expressway,  Suite 210,  LB-59,  Dallas,  Texas  75206-1857.  RCG is
registered as an investment  adviser under the  Investment  Adviser Act of 1940,
and is the investment adviser for BFS US and Renaissance III, and the investment
manager for Renaissance US.

     John A. Schmit,  Vice President of Investments for RCG, serves on the Board
of Directors of the Company.  Certain  information  concerning the directors and
executive  officers  of the  Reporting  Persons  is set  forth on  Attachment  1
attached hereto and incorporated herein by reference.

     The  business  addresses of the  directors  and  executive  officers of the
Reporting  Persons  are  set  forth  on  Attachment  1  to  this  Statement  and
incorporated herein by reference.

     (c) BFS US was  organized to carry on the business of an  investment  trust
company and to undertake all kinds of trust and agency  business,  including but
not limited to  investing  in emerging or  undervalued  U.S.  public  companies.
Renaissance  III and  Renaissance  US are engaged in the  business of  investing
principally in emerging or undervalued U.S. public companies.  RCG is engaged in
the  business  of an  investment  adviser  and serves as  investment  adviser to
Renaissance III and BFS US and investment manager to Renaissance US.

     (d) Neither any of the Reporting Persons nor, to the best knowledge of such
persons, any person named in Attachment 1 to this Statement,  has been convicted
in a criminal proceeding in the past five years (excluding traffic violations or
similar misdemeanors).

     (e) Neither any of the Reporting Persons nor, to the best knowledge of such
persons, any person named in Attachment 1 to this Statement, was during the last
five years a party to a civil proceeding of a judicial or administrative body of
competent  jurisdiction  as a result of which such person was or is subject to a
judgment,  decree, or final order enjoining future violations of, or prohibiting
or mandating  activities subject to, federal or state securities laws or finding
any violation with respect to such laws.

     (f) All persons named on Attachment 1 to this Statement are citizens of the
United States or the United Kingdom. All of the directors and executive officers
of Renaissance  III are citizens of the United  States.  All of the directors of
Renaissance US and BFS US are citizens of the United Kingdom, except for Russell
Cleveland  and C. A.  Rundell,  Jr.,  who are  citizens  of the  United  States.
-------------------------------------------------------------------------------




CUSIP No. 367220100                   13D                   Page 6 of __ Pages

Item 3. Source and Amount of Funds or Other Consideration.

     The total  amount of funds  required  by BFS US to acquire  the  securities
reported  in Item 5(a) was  $2,957,591.  The  source of such  funds was  working
capital of BFS US.

     The total  amount of funds  required  by  Renaissance  III to  acquire  the
securities  reported in Item 5(a) was  $1,514,105.  The source of such funds was
working capital of Renaissance III.

     The  total  amount of funds  required  by  Renaissance  US to  acquire  the
securities  reported in Item 5(a) was  $1,482,095.  The source of such funds was
working capital of Renaissance US.


--------------------------------------------------------------------------------
Item 4.  Purpose of Transaction.

     Each of the Reporting Persons acquired  beneficial  ownership of the Common
Shares  reported in Item 5(a) in the ordinary  course of business for investment
purposes.  As stated in Item 2(b)  above,  John A.  Schmit,  Vice  President  of
Investments for RCG, serves on the Board of Directors of the Company.

     The Reporting  Person(s) may participate in discussions  with management or
third  parties in which the  Reporting  Person(s) may suggest or take a position
with  respect to potential  changes in the  operations,  management,  or capital
structure  of the  Company  as a means  of  enhancing  stockholder  value.  Such
suggestions or positions may relate to one or more of the transactions specified
in clauses (a) through (j) of Item 4 of this Schedule 13D form.

     Each Reporting Person continues to assess the Company's business, financial
condition, results of operations and prospects, general economic conditions, the
securities  markets  in  general  and  those  for the  Company's  securities  in
particular,  other  developments and investment  opportunities,  as well as each
Reporting Person's investment objectives.  Depending on such assessments, any or
all of the Reporting Persons may acquire additional  securities or may determine
to sell or otherwise dispose of some or all of its holding of securities.

     Other than as described above and in clauses (a) and (c) below, none of the
Reporting  Persons has any present  plans or proposals  which relate to or would
result in any transaction, change, or event specified in clauses (a) through (j)
of Item 4 of this Schedule 13D.

     (a) On October 15, 2003, BFS US,  Renaissance III,  Renaissance US, and RCG
entered  into a  convertible  loan  agreement  (the "Loan  Agreement")  with the
Company pursuant to which BFS US,  Renaissance III, and Renaissance US purchased
an aggregate of $2,500,000 in 8%  Convertible  Debentures  (the "8%  Convertible
Debentures"). This transaction is more fully described in Item 6 and the form of
8% Convertible Debenture is attached hereto as Exhibit 2.

     (c) The Loan Agreement  gives RCG the right to designate a nominee to serve
as a member of the Board of Directors of the Company,  and to designate a second
nominee  if the  Company  is in  monetary  default  under  the terms of the Loan
Agreement, subject to certain limitations and restrictions.  This transaction is
more fully described in Item 6.

--------------------------------------------------------------------------------
Item 5. Interest in Securities of the Issuer.

     (a) Under SEC rules and as of the date of this filing,  BFS US beneficially
owns 4,083,332 Common Shares, Renaissance III beneficially owns 2,041,667 Common
Shares and Renaissance US  beneficially  owns 2,041,668  Common Shares,  each as
computed on a fully converted basis.

     Based upon information  filed with the Securities and Exchange  Commission,
the Common Shares beneficially owned by BFS US, Renaissance III, Renaissance US,
and together represent  approximately 9.0%, 4.5%, 4.5% and 17.9%,  respectively,
of the outstanding Common Shares of the Company.  The foregoing  percentages are
calculated  based  on the  45,602,236  shares  of the  Company's  Common  Shares
outstanding  as of November 7, 2003, as reported in the Company's  most recently
filed Form 10-Q.

     BFS US,  Renaissance III, and Renaissance US disclaim that they are members
of a group for purposes of Regulation 13D.




CUSIP No. 367220100                   13D                   Page 7 of __ Pages

     The Common Shares deemed to be  beneficially  owned by BFS US are comprised
of 1,999,999  Common Shares and 2,083,333 Common Shares issuable upon conversion
of a $1,250,000 8% Convertible  Debenture.  This debenture is fully described in
Item 6 and is in substantially the form of Exhibit 2.

     The Common Shares deemed to be  beneficially  owned by Renaissance  III are
comprised of 1,000,000  Common Shares and 1,041,667  Common Shares issuable upon
conversion  of a $625,000 8%  Convertible  Debenture.  This  debenture  is fully
described in Item 6 and is in substantially the form of Exhibit 2.

     The Common Shares deemed to be  beneficially  owned by  Renaissance  US are
comprised of 1,000,001  Common Shares and 1,041,667  Common Shares issuable upon
conversion  of a $625,000 8%  Convertible  Debenture.  This  debenture  is fully
described in Item 6 and is in substantially the form of Exhibit 2.


Number of shares as to which BFS US has:

(i)     Sole power to vote or to direct the vote of: 4,083,332.
(ii)    Shared power to vote or to direct the vote of: None.
(iii)   Sole power to dispose or to direct the disposition of: 4,083,332.
(iv)    Shared power to dispose or to direct the disposition of: None.

Number of shares as to which Renaissance III has:

(i)     Sole power to vote or to direct the vote of: 2,041,667.
(ii)    Shared power to vote or to direct the vote of: None.
(iii)   Sole power to dispose or to direct the disposition of: 2,041,667.
(iv)    Shared power to dispose or to direct the disposition of: None.

Number of shares as to which Renaissance US has:

(i)     Sole power to vote or to direct the vote of: 2,041,667.
(ii)    Shared power to vote or to direct the vote of: None.
(iii)   Sole power to dispose or to direct the disposition of: 2,041,667.
(iv)    Shared power to dispose or to direct the disposition of: None.


     (b) No transaction in the Common Shares was effected by a Reporting  Person
within the last 60 days.

     (c) No person other than the Reporting  Persons has the right to receive or
the power to direct the receipt of dividends from, or the proceeds from the sale
of, the Common Shares beneficially owned by the Reporting Persons.

     (d) Not applicable.

--------------------------------------------------------------------------------

Item 6.  Contracts,  Arrangements,  Understandings or Relationships with Respect
         to Securities of the Issuer.

     On October 15,  2003,  BFS US,  Renaissance  III,  Renaissance  US, and RCG
entered  into a  Convertible  Loan  Agreement  (the "Loan  Agreement")  with the
Company pursuant to which BFS US,  Renaissance III, and Renaissance US purchased
an aggregate of $2,500,000 in 8%  Convertible  Debentures  (the "8%  Convertible
Debentures"). BFS US purchased $1,250,000 in such 8% Convertible Debentures, and
Renaissance III and Renaissance US each purchased  $625,000 in such  Debentures.
The Debentures bear interest at 8% per annum, which is payable monthly,  and are
convertible into 4,166,777 Common Shares of the Company, at the holder's option,
at a conversion price of $0.60 per share.  Monthly principal payments of $37,500
(in the aggregate)  begin in the fourth quarter of 2006 and the maturity date of
the 8% Convertible Debentures is October 15, 2008. The 8% Convertible Debentures
are secured by the producing wellbores that the Company develops using the funds
raised by the 8% Convertible Debentures.





CUSIP No. 367220100                   13D                   Page 8 of __ Pages

     The Loan Agreement gives RCG the right to designate a nominee to serve as a
member  of the  Board of  Directors  of the  Company  while  the 8%  Convertible
Debentures are outstanding.  In addition,  if the Company is in monetary default
under the Loan  Agreement and remains in such monetary  default for at least ten
(10) days during any period when RCG has the right to designate a nominee to the
Board of Directors,  the Loan Agreement gives RCG the right to designate another
nominee to the Board of Directors.  The Loan  Agreement  requires the Company to
nominate  any  designee  that RCG has the right to  designate,  and requires the
Company to use its best  efforts to secure the  election  of any such  designee.
When the Reporting Persons cease, in the aggregate, to be the beneficial holders
of Common  Shares  representing  at least  five  percent  (5%) of the issued and
outstanding Common Shares of the Company,  the Company shall not be obligated to
nominate  designees of RCG who are not  affiliates  of RCG.  John  Schmit,  Vice
President of Investments  for RCG,  joined the Board of Directors of the Company
as the designee of RCG effective October 15, 2003.

--------------------------------------------------------------------------------

Item 7.  Material to be Filed as Exhibits.

Exhibit 1: Joint Filing Agreement Pursuant to Rule 13d-1(k)

Exhibit 2: Form 8.00%  Convertible  Debenture of the Company  dated  October 15,
     2003 by and among The Frost National Bank,  Custodian FBO  Renaissance  US,
     HSBC Global Custody Nominee (U.K.)  Limited,  Custodian FBO BFS US, and The
     Frost National Bank,  Custodian FBO Renaissance  III  (previously  filed as
     Exhibit  4.5 to the  Company's  Quarterly  Report  on  From  10-Q  for  the
     quarterly  period  ended  September  30,  2003,  which was  filed  with the
     Commission  on  November  10,  2003,  and which is  incorporated  herein by
     reference).



--------------------------------------------------------------------------------


CUSIP No. 367220100                   13D                      Page 9 of 9 Pages


                                    SIGNATURE


     After reasonable inquiry and to the best of the knowledge and belief of the
undersigned persons, such persons certify that the information set forth in this
statement is true, complete and correct.

     Dated as of: December 23, 2003



                              RENAISSANCE CAPITAL GROWTH & INCOME FUND III, INC.



                              By:
                              Name:       Russell Cleveland
                              Title:      President and Chief Executive Officer


                              RENAISSANCE US GROWTH & INCOME TRUST PLC



                              By:
                              Name:       Russell Cleveland
                                 Title: Director


                              BFS US SPECIAL OPPORTUNITIES TRUST PLC



                              By:
                              Name:       Russell Cleveland
                                 Title: Director



-------------------------------------------------------------------------------

Attention. Intentional misstatements or omissions of fact constitute federal
criminal violations (see 18 U.S.C. 1001).






                                  ATTACHMENT 1

     The name, business address, and principal occupation of the directors and
executive officers of Renaissance III are as follows:

DIRECTORS

Name                        Business Address                Principal Occupation

Edward O. Boshell, Jr.      c/o RENN Capital Group,                    Director
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

Russell Cleveland           c/o RENN Capital Group, Inc.               Director
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

Peter Collins               c/o RENN Capital Group, Inc.               Director
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

Ernest C. Hill              c/o RENN Capital Group, Inc.               Director
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

Charles C. Pierce, Jr.      c/o RENN Capital Group, Inc.               Director
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857
OFFICERS

Name                        Business Address                Principal Occupation

Russell Cleveland           c/o RENN Capital Group, Inc.     President and Chief
                            8080 North Central Expressway    Executive Officer
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

John A. Schmit              c/o RENN Capital Group, Inc.         Vice President
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

Robert C. Pearson           c/o RENN Capital Group, Inc.         Vice President
                            8080 North Central Expressway
                            Suite 210, LB-59
                            Dallas, TX 75206-1857

Barbara A. Butschek         c/o RENN Capital Group, Inc.           Secretary and
                            8080 North Central Expressway              Treasurer
                            Suite 210, LB-59
                            Dallas, TX 75206-1857






     The name, business address,  and principal  occupation of the directors and
executive officers of Renaissance US are as follows:


DIRECTORS

Name                                 Business Address                  Principal
                                                                      Occupation

Michael B. Cannan                    c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

Russell Cleveland                    c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

Ernest J. Fenton                     c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

Lord Mark Fitzalan Howard OBE        c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

C. A. Rundell, Jr.                   c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

William W. Vanderfelt                c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB
OFFICERS

None








     The name, business address,  and principal  occupation of the directors and
executive officers of BFS US are as follows:


DIRECTORS

Name                                 Business Address                  Principal
                                                                      Occupation

Lord Lang of Monkton                 c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

Russell Cleveland                    c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

Ernest John Fenton                   c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

Anthony Arthur Reid                  c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB

William Weeks Vanderfelt             c/o Sinclair Henderson Limited     Director
                                     23 Cathedral Yard
                                     Exeter EX11HB
OFFICERS

None








                                                                       EXHIBIT 1

                JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

     The  undersigned  acknowledge  and agree that the  foregoing  statement  on
Schedule 13D is filed on behalf of each of the undersigned in the capacities set
forth below. The undersigned  acknowledge that each shall be responsible for the
timely filing of such  amendments,  and for the completeness and accuracy of the
information  concerning it contained  therein,  but shall not be responsible for
the completeness and accuracy of the information  concerning the others,  except
to the  extent  it knows or has  reason to  believe  that  such  information  is
inaccurate.  This  Joint  Filing  Agreement  may be  executed  in any  number of
counterparts  and all of such  counterparts  taken together shall constitute one
and the same instrument.

                              RENAISSANCE CAPITAL GROWTH & INCOME FUND III, INC.



                              By:
                              Name:       Russell Cleveland
                              Title:      President and Chief Executive Officer


                              RENAISSANCE US GROWTH & INCOME TRUST PLC



                              By:
                              Name:       Russell Cleveland
                                 Title: Director


                              BFS US SPECIAL OPPORTUNITIES TRUST PLC



                              By:
                              Name:       Russell Cleveland
                                 Title: Director






                                                                       EXHIBIT 2


--------------------------------------------------------------------------------
This  Debenture has not been  registered  under the  Securities  Act of 1933, as
amended ("Act"),  or applicable state securities laws ("State Acts"),  and shall
not be sold,  hypothecated,  or otherwise  transferred,  unless such transfer is
made    in     compliance     with    the    Act    and    the    State    Acts.
--------------------------------------------------------------------------------





                               GASCO ENERGY, INC.



                           8.00% Convertible Debenture



$1,000,000                                                                 No. 3


                        Date of Issue: September30, 2003

     Gasco Energy, Inc., a Nevada corporation (the "Company" or "Borrower"), for
value received, promises to pay to:

                   HSBC Global Custody Nominee (U.K.) Limited

                             Designation No. 896414

or to its order, (together with any assignee, jointly or severally, the "Holder"
or  "Lender")  on or before  September  30, 2008 (the "Due Date")  (unless  this
Debenture  shall  have been  sooner  called  for  redemption  or  presented  for
conversion as herein provided), the sum of One Million Dollars ($1,000,000) (the
"Principal  Amount") and to pay interest on the unpaid  Principal  Amount at the
rate of 8.00% per annum.  All payments of both  principal and interest  shall be
made at the address of the Holder  hereof as it appears in the books and records
of the  Borrower,  or at such  other  place as may be  designated  by the Holder
hereof.






     1. Interest. Interest on the Principal Amount outstanding from time to time
shall be  payable in  monthly  installments  commencing  November  1, 2003,  and
subsequent  payments  shall be made on the  first day of each  month  thereafter
until the Principal  Amount and all accrued and unpaid  interest shall have been
paid in full.  Overdue  principal  and  interest  on the  Debenture  shall  bear
interest at the maximum rate permitted by applicable law.

     2.  Maturity.  If not sooner paid,  redeemed or converted,  this  Debenture
shall mature on September 30, 2008 at which time the remaining  unpaid Principal
Amount, and all accrued and unpaid interest and any other charges then due under
the Convertible Loan Agreement, shall be due and payable in full. This Debenture
shall be prepaid pro rata with any prepayments of Indebtedness other than Senior
Obligations.  This  Debenture  shall be senior in right of  payment to all other
Indebtedness of the Company, except the Senior Obligations.

     3.  Mandatory  Principal  Installments.  If this  Debenture  is not  sooner
redeemed or  converted  as  provided  hereunder,  Borrower  shall pay to Holder,
commencing on October 1, 2005 and continuing on the first day of each successive
month thereafter prior to maturity, mandatory principal redemption installments,
each of such  installments  to be in the amount of Fifteen Dollars ($15) per One
Thousand Dollars ($1,000) of the then remaining  Principal Amount,  and further,
at maturity,  Borrower shall pay to Holder a final  installment of the remaining
unpaid  Principal  Amount and all accrued and unpaid  interest on this Debenture
and any other  charges  then due under this  Debenture or the  Convertible  Loan
Agreement.





     4. Optional Redemption by Holder.

          (a) If at any time  after the date  hereof  (i) the  Company's  Common
     Stock, par value $0.01 per share ("Common Stock"), is not listed on the New
     York Stock Exchange  ("NYSE") or the American Stock Exchange  ("AMEX"),  or
     quoted on the NASDAQ  National  Market  System  ("National  Market") or the
     NASDAQ SmallCap System ("SmallCap") or the Over-the-Counter  Bulletin Board
     ("OTCBB"),  (ii)  there is a change  of  control  of the  Company's  voting
     securities,  without  the written  consent of the Holder,  (iii) there is a
     change of at least  two-thirds  (2/3) of the members of the Company's Board
     of  Directors  as it shall  exist on the date  hereof,  without the written
     consent  of the  Holder,  (iv) all or  substantially  all of the  assets or
     capital  stock of the  Company or its  subsidiaries  are sold,  without the
     consent of the Holder, or (v) the Company or its subsidiaries are merged or
     consolidated  with or  into  unaffiliated  entities,  without  the  written
     consent  of  Holder,  the  Holder  shall  have the  right to  require  this
     Debenture  to be redeemed by the Company at the sum equal to the  Principal
     Amount,  together  with an  amount  equal  to an 18%  annual  yield  on the
     Principal  Amount  outstanding  from  time  to  time  through  the  date of
     redemption (the "Redemption Date").

          (b) The Holder may  exercise  its right to  require  that the  Company
     redeem this Debenture  pursuant to Section 4(a) prior to maturity by giving
     notice  thereof to the Company,  which  notice  shall  specify the terms of
     redemption  (including  the place at which the Holder may obtain  payment),
     the total redemption  payment and the Redemption Date, which date shall not
     be less than 30 days nor more than 90 days after the date of the notice.







     5. Optional Redemption by Company.

          (a) On any interest  payment date,  and after  receipt of  irrevocable
     notice  from  the  Borrower  as  provided  for  below,  this  Debenture  is
     redeemable,  in whole  but not in part,  at 101% of the  Principal  Amount,
     together with accrued and unpaid interest  through the Redemption  Date, by
     the Company,  if all of the following  conditions  are  satisfied:  (i) the
     average  closing  bid  price  for the  Common  Stock  for the  twenty  (20)
     consecutive  trading  days  prior to the date of notice  exceeds  an amount
     equal to three and one third (3 1/3)  times the  Conversion  Price  then in
     effect,  and the Common Stock is listed or quoted on the  National  Market,
     the SmallCap,  AMEX,  OTCBB or NYSE;  (ii) the average daily trading volume
     for the  twenty  (20)  consecutive  trading  days  prior to the date of the
     irrevocable  notice  shall be no less than One Hundred  Thousand  (100,000)
     shares;  (iii) the market  price for the Common Stock at the time of notice
     reflects a  price-to-book  value ratio,  based upon the most recently filed
     quarterly  financial  statements of the Borrower,  of no greater than three
     (3), and (iv) the shares of Common Stock  issuable upon  conversion of this
     Debenture  shall have been fully  registered  under  applicable  securities
     laws.  The Company's  right of redemption is subject to the Holder's  prior
     right of conversion of the Debenture.

          (b) If the Holder shall notify the Company in writing of its intent to
     sell or otherwise  transfer the Debenture  (other than to an affiliate or a
     nominee  holder of record),  this Debenture is redeemable at the Borrower's
     option, in whole but not in part, at 101% of the Principle Amount, together
     with  accrued and unpaid  interest  through  the  Redemption  Date,  by the
     Company for a period of up to thirty (30) days after the date of notice.

          (c) The  Company  may  exercise  its  right to redeem  this  Debenture
     pursuant  to  Sections  5(a) and (b) prior to  maturity  by  giving  notice
     thereof to the Holder of this  Debenture  as such name appears on the books
     of the  Borrower,  which  notice  shall  specify  the  terms of  redemption
     (including  the place at which the Holder may  obtain  payment),  the total
     redemption  payment and the Redemption  Date,  which date shall not be less
     than 30 days nor more than 90 days after the date of the notice.







     6. Conversion  Right. The Holder of this Debenture shall have the right, at
Holder's option, at any time, to convert all, or, in multiples of $100,000,  any
part of this Debenture into such number of fully paid and  nonassessable  shares
of Common Stock as provided  herein.  The Holder of this  Debenture may exercise
the  conversion  right by giving  written  notice (the  "Conversion  Notice") to
Borrower  of the  exercise  of such right and stating the name or names in which
the stock  certificate or stock  certificates for the shares of Common Stock are
to be issued and the address to which such certificates shall be delivered.  The
Conversion Notice shall be accompanied by the Debenture. The number of shares of
Common Stock that shall be issuable upon conversion of the Debenture shall equal
the  outstanding  Principal  Amount of the Debenture  divided by the  Conversion
Price (as  defined  below)  and in effect on the date the  Conversion  Notice is
given; provided,  however, that in the event that this Debenture shall have been
partially redeemed,  shares of Common Stock shall be issued pro rata, rounded to
the nearest whole share. Conversion shall be deemed to have been effected on the
date the Conversion  Notice is received (the "Conversion  Date"). In the case of
any Debenture  called for redemption,  the conversion  rights will expire at the
close of business on the Redemption Date. Within twenty (20) business days after
receipt of the  Conversion  Notice,  Borrower  shall  issue and  deliver by hand
against a signed receipt therefor or by United States  registered  mail,  return
receipt  requested,  to the address designated in the Conversion Notice, a stock
certificate or stock certificates of Borrower  representing the number of shares
of Common  Stock to which  Holder is entitled  and a check or cash in payment of
all  interest  accrued  and  unpaid on the  Debenture  up to and  including  the
Conversion  Date.  The  conversion  rights  will be  governed  by the  following
provisions:

          (a) Conversion  Price. On the issue date hereof and until such time as
     an adjustment shall occur, the initial Conversion Price shall be $0.60.

          (b) One Time  Adjustment.  In the event that  Company's  net cash flow
     from  operations for the period  commencing with the date of this Debenture
     through the end of the  Company's  fiscal year ending in 2004, is less than
     $2,000,000, and for the ten (10) trading days following the announcement of
     the Company's  financial results for that period,  whether by press release
     or  public  announcement  or public  filing,  the  volume-weighted  average
     closing bid price for the Common  Stock (the "New  Average  Price") is less
     than the  Conversion  Price,  the  Conversion  Price  shall be  immediately
     reduced to the New Average Price.

          (c)  Adjustment  for  Issuance  of Shares at Less Than the  Conversion
     Price.  If and  whenever  any  Additional  Common  Stock shall be issued by
     Borrower (the "Stock Issue Date") for a  consideration  per share less than
     the Conversion Price,  then in each such case the initial  Conversion Price
     shall be reduced to a new Conversion  Price in an amount equal to the price
     per  share  for the  Additional  Common  Stock  then  issued,  if issued in
     connection  with a sale of shares,  or the value of the  Additional  Common
     Stock then issued,  as  determined in accordance  with  generally  accepted
     accounting  principles,  if issued  other than for cash,  and the number of
     shares  issuable  to  Holder  upon  conversion  shall  be   proportionately
     increased;  and, in the case of  Additional  Common  Stock  issued  without
     consideration,  the initial Conversion Price shall be reduced in amount and
     the number of shares issued upon conversion shall be increased in an amount
     so as to maintain  for the Holder the right to convert the  Debenture  into
     shares equal in amount to the same percentage  interest in the Common Stock
     of the Company as existed for the Holder  immediately  preceding  the Stock
     Issue Date.

          (d) Sale of Shares. In case of the issuance of Additional Common Stock
     for a  consideration  part or all of which shall be cash, the amount of the
     cash  consideration  therefor shall be deemed to be the gross amount of the
     cash paid to Borrower for such shares,  before  deducting any  underwriting
     compensation or discount in the sale,  underwriting or purchase  thereof by
     underwriters or dealers or others  performing  similar  services or for any
     expenses incurred in connection  therewith.  In case of the issuance of any
     shares of Additional Common Stock for a consideration  part or all of which
     shall be other than cash, the amount of the consideration  therefor,  other
     than cash, shall be deemed to be the then fair market value of the property
     received.

          (e) Stock  Splits,  Subdivisions  or  Combinations.  In the event of a
     stock split or  subdivision of shares of Common Stock into a greater number
     of shares, the Conversion Price shall be proportionately  decreased, and in
     the event of a combination  of shares of Common Stock into a smaller number
     of shares,  the Conversion Price shall be proportionately  increased,  such
     increase or decrease,  as the case may be, becoming effective at the record
     date.



          (f) Stock  Dividends.  Shares of Common  Stock issued as a dividend or
     other  distribution  on any class of  capital  stock of  Borrower  shall be
     deemed to have been issued without consideration.

          (g) Exceptions.  The term "Additional  Common Stock" herein shall mean
     all shares of Common Stock or securities  convertible or  exercisable  into
     shares of Common Stock hereafter issued by Borrower (including Common Stock
     held in the treasury of Borrower),  except (A) Common Stock issued upon the
     conversion  of  any of the  Debentures;  (B)  Common  Stock  issuable  upon
     conversion of presently issued and outstanding shares of Preferred Stock of
     the  Borrower or (C) Common  Stock  issuable  upon  exercise  of  presently
     outstanding stock options and warrants.

          (h)  Adjustment  for Mergers and  Consolidations.  In the event of any
     consolidation  or merger of the Company with or into, or the sale of all or
     substantially  all of the  properties  and  assets of the  Company,  to any
     person, and in connection therewith, consideration is payable to holders of
     Common Stock in cash, securities or other property,  then as a condition of
     such  consolidation,  merger or sale,  lawful  provision shall be made, and
     duly  executed  documents  evidencing  the same shall be  delivered  to the
     Holder,  so that the  Holder  shall have the right at any time prior to the
     maturity  of this  Debenture  to  purchase,  at a total  price equal to the
     Conversion  Price  immediately  prior to such event, the kind and amount of
     cash,  securities or other  property  receivable  in  connection  with such
     consolidation,  merger or sale, by a holder of the same number of shares of
     Common Stock as were  convertible by the Holder  immediately  prior to such
     consolidation,  merger or sale.  In any such case,  appropriate  provisions
     shall be made with respect to the rights and interest of the Holder so that
     the provisions  hereof shall  thereafter be applicable  with respect to any
     cash,   securities   or  property   deliverable   upon   exercise   hereof.
     Notwithstanding  the foregoing,  (i) if the Company merges or  consolidates
     with, or sells all or substantially  all of its property and assets to, any
     other person,  and  consideration  is payable to holders of Common Stock in
     exchange  for  their  Common   Stock  in   connection   with  such  merger,
     consolidation  or sale which consists  solely of cash, or (ii) in the event
     of the  dissolution,  liquidation  or winding up of the  Company,  then the
     Holder shall be entitled to receive distributions on the date of such event
     on the same basis with  holders of Common  Stock as if this  Debenture  had
     been converted  immediately prior to such event, less the Conversion Price.
     Upon  receipt of such  payment,  if any,  the  rights of the  Holder  shall
     terminate and cease and this  Debenture  shall expire.  In case of any such
     merger,  consolidation or sale of assets, the surviving or acquiring person
     and,  in the event of any  dissolution,  liquidation  or  winding up of the
     Company,  the Company shall  promptly,  after  receipt of this  surrendered
     Debenture,  make  payment  by  delivering  a  check  in such  amount  as is
     appropriate (or, in the case of  consideration  other than cash, such other
     consideration  as is  appropriate)  to such person as it may be directed in
     writing by the Holder surrendering this Debenture.

          (i)  Distributions.  In the event of  distribution to all Common Stock
     holders of any securities,  cash or properties or assets or other rights to
     purchase securities or assets,  then, after such event, this debenture will
     also be convertible into the kind and amount of securities,  cash and other
     property which the Holder would have been entitled to receive if the Holder
     owned  the  Common  Stock   issuable  upon   conversion  of  the  Debenture
     immediately prior to the occurrence of such event.

          (j)  Capital  Reorganization  and  Reclassification.  In  case  of any
     capital  reorganization or reclassification of the Common Stock of Borrower
     (other  than a change  in par  value or as a  result  of a stock  dividend,
     subdivision,  split up or combination of shares),  this Debenture  shall be
     convertible into the kind and number of shares of stock or other securities
     or property of  Borrower  to which the Holder of the  Debenture  would have
     been entitled to receive if the Holder owned the Common Stock issuable upon
     conversion of the  Debenture  immediately  prior to the  occurrence of such
     event. The provisions of the immediately foregoing sentence shall similarly
     apply to  successive  reorganizations,  reclassifications,  consolidations,
     exchanges,   leases,   transfers  or  other  dispositions  or  other  share
     exchanges.





          (k) Notice.  In the event  Borrower  shall  propose to take any action
     which shall result in an adjustment in the Conversion Price, Borrower shall
     give notice to the Holder of this Debenture, which notice shall specify the
     record date, if any, with respect to such action and the date on which such
     action  is to take  place.  Such  notice  shall be given on or  before  the
     earlier of 10 days  before the  record  date or the date which such  action
     shall be taken.  Such notice  shall also set forth all facts (to the extent
     known)  material to the effect of such action on the  Conversion  Price and
     the number,  kind or class of shares or other  securities or property which
     shall be deliverable  or purchasable  upon the occurrence of such action or
     deliverable upon conversion of this Debenture.

          (l) Certificate.  Following completion of an event which results in an
     adjustment to the Conversion Price, Borrower shall furnish to the Holder of
     this Debenture a statement,  signed by the Chief Executive  Officer and the
     Secretary  of the  Borrower,  of the facts  creating  such  adjustment  and
     specifying the resultant  adjusted  Conversion Price then in effect,  which
     statement shall constitute an amendment to this Debenture.

          (m)  Vote  of  Shareholders.  In the  event  of an  adjustment  to the
     Conversion  Price due to a sale of  securities  by the  Borrower  below the
     Conversion  Price  which  would  result in the  Holders  of all  Debentures
     evidencing  the Loan having the right to acquire  more than 20% of the then
     outstanding  shares of Common Stock,  the Borrower agrees to hold a vote of
     the  shareholders  prior to such event to authorize such an adjustment.  In
     the event the shareholders do not authorize the issuance of such additional
     shares  within such  period,  the Holder  shall have the right to cause the
     Company  to redeem the  Debenture  in  accordance  with the  provisions  of
     Section 4.


     7. Reservation of Shares. Borrower warrants and agrees that it shall at all
times  reserve  and keep  available,  free from  preemptive  rights,  sufficient
authorized  and  unissued  shares of Common  Stock or treasury  shares of Common
Stock necessary to effect conversion of this Debenture.

     8. Taxes.  The Company  shall pay any  documentary  or other  transactional
taxes  attributable  to the issuance or delivery of this Debenture or the shares
of Common Stock issued upon  conversion  by the Holder  (excluding  any federal,
state or local income taxes and any  franchise  taxes or taxes  imposed upon the
Holder by the jurisdiction,  or any political  subdivision thereof,  under which
such Holder is organized or is qualified to do business).

     9. Default.

          (a) Event of Default.  An "Event of Default"  shall exist if an "Event
     of Default" (as defined in that certain Convertible Loan Agreement,  dated,
     September 30, 2003, among Borrower,  Lenders and Renaissance Capital Group,
     Inc., a Texas  corporation,  as Agent for the Lenders (the "Agent"))  shall
     occur and be continuing.

          (b) Remedies Upon Event of Default.  If an Event of Default shall have
     occurred and be continuing, then the Holder may exercise any one or more of
     the rights and remedies  provided in the Loan Documents,  as the Holder, in
     its sole discretion, may deem necessary or appropriate.

          (c) Remedies  Nonexclusive.  Each right, power or remedy of the Holder
     hereof upon the  occurrence of any Event of Default as provided for in this
     Debenture  or now or  hereafter  existing at law or in equity or by statute
     shall be cumulative  and concurrent and shall be in addition to every other
     right,  power or remedy  provided for in this Debenture or now or hereafter
     existing at law or in equity or by statute,  and the  exercise or beginning
     of the  exercise by the Holder or  transferee  hereof of any one or more of
     such rights,  powers or remedies  shall not preclude  the  simultaneous  or
     later  exercise  by the Holder of any or all such other  rights,  powers or
     remedies.

          (d) Expenses. Upon the occurrence of a Default or an Event of Default,
     which occurrence is not cured within the notice provisions, if any provided
     therefore,  Borrower  agrees to pay and shall pay all reasonable  costs and
     expenses (including attorneys' fees and expenses) incurred by the Holder in
     connection with the  preservation  and enforcement of Holder's rights under
     the Convertible Loan Agreement, the Debenture, or any other Loan Document.






     10. Failure to Act and Waiver.  No failure or delay by the Holder hereof to
require  the  performance  of any  term or  terms  of this  Debenture  or not to
exercise any right or any remedy  shall  constitute a waiver of any such term or
of any right or of any  default,  nor shall such delay or failure  preclude  the
Holder hereof from exercising any such right,  power or remedy at any later time
or times.  By accepting  payment after the due date of any amount  payable under
this Debenture,  the Holder hereof shall not be deemed to waive the right either
to require payment when due of all other amounts payable,  or to later declare a
default for failure to effect such payment of any such other amount. The failure
of the Holder of this  Debenture  to give notice of any failure or breach of the
Borrower  under this  Debenture  shall not  constitute  a waiver of any right or
remedy in respect of such continuing failure or breach or any subsequent failure
or breach.

     11.  Consent to  Jurisdiction.  The Company hereby agrees and consents that
any action, suit or proceeding arising out of this Debenture shall be brought in
any state or federal court located in Dallas County, Texas, including the United
States  District  Court for the  Northern  District  of  Texas,  all at the sole
election  of the  Holder  hereof,  and by the  issuance  and  execution  of this
Debenture,  the Borrower irrevocably consents to the exclusive  jurisdiction and
venue  of  each  such  courts.  The  Company  hereby  irrevocably   appoints  CT
Corporation System,  Dallas,  Texas, as agent for the Borrower to accept service
of process for and on behalf of the Borrower in any action,  suit or  proceeding
arising  out of this  Debenture.  Except for  default in payment of  interest or
principal when and as they become due, and except as otherwise  specifically set
forth  herein or  otherwise  agreed to in writing by the  parties,  any  action,
dispute,  claim or  controversy  (all such herein called  "Dispute")  between or
among the parties as to the facts or the  interpretation  of the Debenture shall
be resolved by arbitration as set forth in the Convertible Loan Agreement.

     12. Holder's Right to Request Multiple  Debentures.  The Holder shall, upon
written  request  and  presentation  of the  Debenture,  have the right,  at any
interest  payment  date,  to request  division of this  Debenture  into multiple
instruments, each of such to be in such amounts as shall be requested; provided,
however,  that no  Debenture  shall be  issued  in  denominations  of less  than
$50,000.

     13.  Transfer.  Subject to Section 12.08 of the Convertible Loan Agreement,
this Debenture may be transferred on the books of the Borrower by the registered
Holder hereof, or by Holder's attorney duly authorized in writing,  in multiples
of $50,000, only upon (i) delivery to the Borrower of a duly executed assignment
of the  Debenture,  or part  thereof,  to the proposed new Holder,  along with a
current notation of the amount of payments received and net Principal Amount yet
unfunded,  and  presentment  of such  Debenture  to the  Borrower for issue of a
replacement  Debenture,  or Debentures,  in the name of the new Holder, (ii) the
designation by the new Holder of the Lender's agent for notice, such agent to be
the sole party to whom Borrower  shall be required to provide notice when notice
to Holder is required  hereunder  and who shall be the sole party  authorized to
represent  Lender in regard to modification or waivers under the Debenture,  the
Convertible Loan Agreement, or other Loan Documents;  and any action, consent or
waiver (other than a compromise  of principal and interest)  when given or taken
by Lender's agent for notice, shall be deemed to be the action of the holders of
a majority in amount of the Principal  Amount of the Debenture,  as such holders
are  recorded on the books of the  Borrower,  and (iii) in  compliance  with the
legend to read as follows:

          "This  Debenture has not been  registered  under the Securities Act of
          1933, as amended ("Act"),  or applicable state securities laws ("State
          Acts"), and shall not be sold, hypothecated, or otherwise transferred,
          unless such transfer is made in compliance  with the Act and the State
          Acts."

     The  Company  shall be  entitled  to treat  any  holder  of  record  of the
Debenture  as the Holder in fact thereof and of the  Debenture  and shall not be
bound to recognize any equitable or other claim to or interest in this Debenture
in the name of any other  person,  whether or not it shall have express or other
notice thereof, except as otherwise provided by applicable law.

     14. Notices.  All notices and communications  under this Debenture shall be
in writing and shall be either delivered in person or by overnight service, such
as FedEx, and accompanied by a signed receipt  therefor;  or mailed  first-class
United States certified mail,  return receipt  requested,  postage prepaid,  and
addressed as follows: (i) if to the Borrower at its address for notice as stated
in the Convertible Loan Agreement;  and (ii) if to the Holder of this Debenture,
to the address (a) of such Holder as it appears on the books of the  Borrower or
(b) in the case of a partial assignment to one or more Holders,  to the Lender's
agent for  notice,  as the case may be.  Any  notice of  communication  shall be
deemed given and received as of the date of such  delivery if  delivered;  or if
mailed, then three days after the date of mailing.

     15. Maximum Interest Rate.

          (a) Regardless of any provision  contained in this  Debenture,  Lender
     shall never be  entitled  to  receive,  collect or apply as interest on the
     Debenture any amount in excess of interest  calculated at the Maximum Rate,
     and,  in the event  that  Lender  ever  receives,  collects  or  applies as
     interest  any such excess,  the amount  which would be  excessive  interest
     shall be  deemed  to be a  partial  prepayment  of  principal  and  treated
     hereunder as such; and, if the principal amount of the Debenture is paid in
     full,  any  remaining  excess  shall  forthwith  be  paid to  Borrower.  In
     determining  whether or not the interest paid or payable under any specific
     contingency  exceeds interest  calculated at the Maximum Rate, Borrower and
     Lender shall,  to the maximum extent  permitted  under  applicable law, (i)
     characterize any non principal payment as an expense, fee or premium rather
     than as  interest,  (ii)  exclude  voluntary  prepayments  and the  effects
     thereof, and (iii) amortize, pro rate, allocate and spread, in equal parts,
     the total amount of interest throughout the entire contemplated term of the
     Debenture;  provided  that,  if the Debenture is paid and performed in full
     prior to the end of the full contemplated term thereof, and if the interest
     received  for the  actual  period of  existence  thereof  exceeds  interest
     calculated at the Maximum Rate,  Lender shall refund to Borrower the amount
     of such  excess or credit the amount of such excess  against the  principal
     amount of the Debenture and, in such event,  Lender shall not be subject to
     any penalties provided by any laws for contracting for,  charging,  taking,
     reserving or  receiving  interest in excess of interest  calculated  at the
     Maximum Rate.

          (b) "Maximum  Rate" shall mean,  on any day,  the highest  nonusurious
     rate of interest (if any)  permitted by applicable law on such day that, at
     any time or from time to time,  may be  contracted  for,  taken,  reserved,
     charged or received on the  Indebtedness  evidenced by the Debenture  under
     the laws which are  presently in effect of the United  States of America or
     by the laws of any other jurisdiction which are or may be applicable to the
     Holders of the Debenture and such  Indebtedness or, to the extent permitted
     by law,  under such  applicable  laws of the United States of America or by
     the laws of any other  jurisdiction  which are or may be  applicable to the
     Holder of the  Debenture  and which may  hereafter  be in effect  and which
     allow a higher maximum  nonusurious  interest rate than applicable laws now
     allow.







     16. Convertible Loan Agreement, Guaranty and [the Mortgage]. This Debenture
is issued pursuant to the Convertible Loan Agreement, and the Holder is entitled
to all the rights and  benefits  thereunder.  Both  Borrower and the Holder have
participated  in  the  negotiation  and  preparation  of  the  Convertible  Loan
Agreement and of this Debenture.  Borrower agrees that a copy of the Convertible
Loan Agreement with all amendments,  additions and substitutions  therefor shall
be  available  to the  Holder  at the  offices  of  Borrower.  The  indebtedness
evidenced by this Debenture is secured  pursuant to [the Mortgage] dated of even
date herewith among the Company, certain of its subsidiaries and the Holder, and
the Holder is entitled to all rights and benefits of a secured party thereunder.
The payment and  performance  of this  Debenture is  guaranteed by the Company's
subsidiaries pursuant to their Guaranty dated of even date herewith.


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     17. Defined Terms. Capitalized terms used but not defined herein shall have
the meaning given them in the Convertible Loan Agreement.

     18.  Governing Law. This  Debenture  shall be governed by and construed and
enforced in accordance with the substantive laws of the State of Texas,  without
regard to the conflicts of laws provisions  thereof,  and the applicable laws of
the United States.

     IN WITNESS  WHEREOF,  the  Company  has caused  this  Debenture  to be duly
issued, executed and delivered on the date and year above stated.



                           GASCO ENERGY, INC.



                        By:
                      Name:
                     Title: