GPS is quite a bit different. The satellites just orbit and send the same information out. The user device doesn’t have to send anything back - the “communication” is only 1-way. Also, GPS is significantly further out from the planet and involves a lot less satellites, so it is not really feasible to turn them off specifically targeting a small area or an individual target - you’d have to black out a huge chunk of the planet to reliably block “an enemy” from using it.
GPS is quite a bit different. The satellites just orbit and send the same information out. The user device doesn’t have to send anything back - the “communication” is only 1-way. Also, GPS is significantly further out from the planet and involves a lot less satellites, so it is not really feasible to turn them off specifically targeting a small area or an individual target - you’d have to black out a huge chunk of the planet to reliably block “an enemy” from using it.
And that is why Russia also uses GPS.