EXHIBIT 23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form
S-8 No. 33-41007) pertaining to the GATX Corporation Salaried Employees
Retirement Savings Plan, of our report dated May 16, 2005, with respect to the
financial statements and supplemental schedule of GATX Corporation Salaried
Employees Retirement Savings Plan included in this Annual Report (Form 11-K) for
the year ended December 31, 2004.


                                                  /s/ Ernst & Young LLP
                                                -------------------------
                                                    Ernst & Young LLP


Chicago, Illinois
June 24, 2005