What do you mean by "microwave technology"?
Microwaves is everything from 1Ghz (or less, based on some papers) to light.
Microwave technology *is* GPS because is about 1.5GHz, is also GSM at 0.8Ghz or 1.9Ghz, is WIFI/WIMAX/WIBREE/WIBRO/Bluetooth/ZIGBEE/microwave owens/car tracking radars on 2.3Ghz-2.7Ghz, again WIFI on 5GHz,TV relays and WIMAX again on 3.5GHz and so one to 420Ghz.