GPSabbr. Global Positioning Systemgpsabbr. gallons per secondAmerican Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.GPS abbreviation for 1. (Navigation) global positioning system 2. (Education) (in Australia) Great Public Schools; used of a group of mainly nonstate schools, and of sporting competitions between them Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014GPS n. Global Positioning System. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.