GNSS receivers are passive devices that receive beacons broadcasted from the satellites. It's technically impossible to spy on someone with GNSS.
And 99.99% of those GNSS receivers are connected to the internet. Or are in proximity to an (American controlled/designed) internet connected device.
This sounds like you have an issue with internet connected devices.
You can’t bomb a person based on an IP address
If we assume that person have a phone, which is majority of these devices with wifi and bluetooth you don't even need any GNSS.
My pedantic self says GNSS includes other non-US constellations such as GLONASS, Galileo and Beidou, and they flew those satellites because they don't fully trust US GPS