Join Date: May 2012
Location: Sun, rain, and snow
• Horses: 0
GPS itself just listens to signals from orbiting satellites so no, in that sense nothing is used wrt your data allowance. You don't even need a phone/data connection for straightforward GPS use as you'll know from the operation of a car-based GPS.
But GPS on a phone is often (and optionally) linked directly to Google maps or some other online map service so in that case yes; your data allowance would take a hit as the map for the area around your current GPS location is pulled down.
So "GPS" is completely free but "GPS Navigation" will generally eat into your data allowance - unless you get a navigator using local (ie. Stored on the SD card) maps.
Red on right, white on left, insanity in the middle