If you get a chance, power down the computer from the menu. Put the windows down if it's hot inside for A/C won't work. once powered down, don't touch anything or open the door or anything. Give it about 5 mins or so, push on brake or open door. Screen should boot right up. Move vehicle and see if GPS doesn't move to correct location.
If no help. Get a new service request in. The GPS antenna is funky. Anything is possible that the gps board may have created an issue when it was re energized. Friend was installing radar detector on his MY and not long after, the GPS was causing similar issues. Come to find out, when he removed the installed power wire, all things GPS were working again.