EXHIBIT 32

                   GATX FINANCIAL CORPORATION AND SUBSIDIARIES

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

    CERTIFICATION 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 Quarterly Report of GATX Financial Corporation (the
"Company") on Form 10-Q for the period ending March 31, 2007, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), each of
the undersigned officers of the Company, certify, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that:

          (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/ Brian A. Kenney                     /s/ Robert C. Lyons
-------------------------------------   ----------------------------------------
Brian A. Kenney                         Robert C. Lyons
Chairman, President and                 Vice President and
Chief Executive Officer                 Chief Financial Officer

May 3, 2007

     This certification accompanies the Report pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 and shall not be deemed filed by GATX Financial
Corporation for purposes of Section 18 of the Securities Exchange Act of 1934,
as amended.

     A signed original of this written statement required by Section 906 has
been provided to GATX Financial Corporation and will be retained by GATX
Financial Corporation and furnished to the Securities and Exchange Commission or
its staff upon request.


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