CERTIFICATION
                     PURSUANT TO 18 U.S.C. SECTION 1350,
                  AS ADOPTED PURSUANT TO SECTION 906 OF THE
                          SARBANES-OXLEY ACT OF 2002


     The  undersigned  hereby  certify,  pursuant to 18 U.S.C.  Section 1350, as
adopted pursuant to Section 906 of the  Sarbanes-Oxley Act of 2002, that, to the
undersigned's  best knowledge and belief,  the Quarterly Report on Form 10-Q for
the Geodyne  Energy Income  Limited  Partnership III-G ("Issuer") for the period
ending June 30, 2002 as filed with the Securities and Exchange Commission on the
date hereof (the "Report"):

      (a)   fully complies  with the  requirements of  section 13(a) or 15(d) of
            the Securities Exchange Act of 1934; and
      (b)   the information  contained  in  the Report fairly  presents,  in all
            material   respects,   the  financial   condition  and   results  of
            operations of the Issuer.

      Dated this 13th day of August, 2002.

                              GEODYNE ENERGY INCOME LIMITED PARTNERSHIP III-G
                              ("Issuer")

                              //S//Dennis R. Neill
                              -------------------------------------
                              Dennis R. Neill
                              President (Chief Executive Officer)

                              //s//Craig D. Loseke
                              -------------------------------------
                              Craig D. Loseke
                              Chief Financial Officer