X0303 5 2008-12-31 false 0 0 0000040211 GATX CORP GMT 0001422898 Brooks Michael T. 222 W. ADAMS ST. CHICAGO IL 60606 false true false false Sr. VP & CIO Common Stock 2898 D Common Stock 401(k) 2008-12-31 5 J false 45.834 30.97 A 49.43 I 401(k) Plan The price of the stock is based on the closing price on 12/31. These shares were acquired during the fiscal year (1/1-12/31) pursuant to the GATX 401(k) plan. Lisa M. Ibarra, by Power of Attorney on behalf of Michael T. Brooks 2009-01-30