gpi-20121231.xmlEX-101.INS - XBRL INSTANCE DOCUMENT
gpi-20121231.xsdEX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
gpi-20121231_cal.xmlEX-101.CAL - XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT
gpi-20121231_def.xmlEX-101.DEF - XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
gpi-20121231_lab.xmlEX-101.LAB - XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
gpi-20121231_pre.xmlEX-101.PRE - XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT