EX-99.906CERT

      CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

I, Bruce N. Alpert, Principal Executive Officer of Gabelli Capital Series Funds,
Inc. (the "Registrant"), certify that:

      1.   The Form N-CSR of the Registrant (the "Report") fully complies
           with the requirements of Section 13(a) or 15(d) of the
           Securities Exchange Act of 1934, as amended; and

      2.   The information contained in the Report fairly presents, in all
           material respects, the financial condition and results of operations
           of the Registrant.


Date: March 9, 2004                 /s/ Bruce N. Alpert
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                                    Bruce N. Alpert, Principal Executive
                                    Officer and Principal Financial Officer