The vehicle is seen in Campaign and in several Spec Ops missions as well. Some GAZs have a machine gun on top that is used by the enemy. Their main role is to transport troops. The vehicle is used by the Russian military as a equivalent to the American M1026 HMMWV.
The Paris variant, note the additional antennae and shattered windscreen.
The GAZ-2975 appears in Call of Duty: Advanced Warfare as a vehicle used by the Korean People's Army during the level Induction. The player must flank it in order to destroy it and move along.
The Atlas Corporation also uses the GAZ to a certain extent; first demonstrated during a simulated KVA assault on Camp David in one of their training facilities. Later, more can be seen driven around by Atlas HazMat teams cleaning nuclear radiation in Detroit, and KVA who took over them.