The GS file extension is related to the eXplorist GPS navigation and used for its geocache waypoint files.
GS file extension - eXplorist GPS geocache waypoint file
What is gs file? How to open gs files?
File type specification:
The GS file extension is associated with the eXplorist a GPS navigation devices for outdoor tourists, hunters, geocachers etc., developed by MiTAC International Corporation. The .gs file stores geocache data.