Earlier quoted context omitted.
Disabling the antennas is the only way to be sure. There will typically be a coax connection that you can cap with a terminator. GPS can be merged with other radios you might not want to lose but suitable splitters are available.
GPS uses a different frequency and a very weak signal. The antenna is typically separate from the others but it's very small 1. https://learn.sparkfun.com/tutorials/gnss-chip-antenna-hooku...
uh-oh