While often confused, they serve completely different purposes in a navigation system: GPS vs GPRS vs GSM: How is GPS different from GPRS and GSM?
"GPRS Navigation" usually refers to the of two distinct technologies: GPS (Global Positioning System) for location pinpointing and GPRS (General Packet Radio Service) for transmitting that location data over cellular networks. 1. How GPRS and GPS Work Together Gprs Navigation