Exhibit 31B
Certification of Principal Financial Officer
I, Robert C. Lyons, certify that:
1. I have reviewed this Quarterly Report on Form 10-Q/A of GATX Corporation; and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
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| | /s/ Robert C. Lyons | |
| | Robert C. Lyons | |
| | Senior Vice President and Chief Financial Officer | |
| |
July 5, 2011
