Exhibit 32.2

                        Certification of CFO Pursuant to
                             18 U.S.C. Section 1350,
                             as Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Annual Report on Form 10-K of GAMCO Investors, Inc. (the
"Company") for the year ended December 31, 2006 as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), John C. Ferrara, as
Interim Chief Financial Officer of the Company, hereby certifies, pursuant to 18
U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of
2002, that, to the best of his knowledge:

     (1)  The Report fully complies with the requirements of Section 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

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


/s/    John C. Ferrara
----------------------
Name:  John C. Ferrara
Title: Interim Chief Financial Officer
Date:  March 16, 2007

This certification accompanies the Report pursuant to ss. 906 of the
Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the
Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of ss.18
of the Securities Exchange Act of 1934, as amended.