GPS is actually a couple of different signals, and the general public gets the shitty one. The military has some additional protections and better receivers.
Feel this is somewhat an understatement, it's cryptographically signed and encrypted, as far as protection goes it's wandering onto an active battlefield naked vs being in a modern tank.
https://www.cnet.com/culture/truck-driver-has-gps-jammer-acc...
It's also something air defense teams would use to try to redirect missles (make them miss their mark because they have to rely on less effective navigation matters)
On the other hand, radio transmission is relatively easy to locate, and ham radio operators do it for fun ( https://en.wikipedia.org/wiki/Transmitter_hunting ) ... so it should't be that hard to find a source.
[1] https://www.forbes.com/sites/meriameberboucha/2019/01/28/how...