<SEC-DOCUMENT>0000040211-18-000057-index.html : 20180627
<SEC-HEADER>0000040211-18-000057.hdr.sgml : 20180627
<ACCEPTANCE-DATETIME>20180627154530
ACCESSION NUMBER:		0000040211-18-000057
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20171231
FILED AS OF DATE:		20180627
DATE AS OF CHANGE:		20180627

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GATX CORP
		CENTRAL INDEX KEY:			0000040211
		STANDARD INDUSTRIAL CLASSIFICATION:	TRANSPORTATION SERVICES [4700]
		IRS NUMBER:				361124040
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02328
		FILM NUMBER:		18921752

	BUSINESS ADDRESS:	
		STREET 1:		222 WEST ADAMS STREET
		CITY:			CHICAGO
		STATE:			X1
		ZIP:			60606-5314
		BUSINESS PHONE:		3126216200

	MAIL ADDRESS:	
		STREET 1:		222 WEST ADAMS STREET
		CITY:			CHICAGO
		STATE:			X1
		ZIP:			60606-5314

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GENERAL AMERICAN TRANSPORTATION CORP
		DATE OF NAME CHANGE:	19750722
</SEC-HEADER>
<DOCUMENT>
<TYPE>11-K
<SEQUENCE>1
<FILENAME>gmt-20171231xhourly.htm
<DESCRIPTION>11-K
<TEXT>
Document 1 - file: gmt-20171231xhourly.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>a20171231hourlyexhibit231.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 2 - file: a20171231hourlyexhibit231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>gatxlogoa01a16.jpg
<DESCRIPTION>LOGO
<TEXT>
Document 3 - file: gatxlogoa01a16.jpg

</DOCUMENT>
</SEC-DOCUMENT>