[GnatGoSplat]

If my ROM flashed correctly, GPS should work. It took 10-minutes or so before mine started finding satellites.

In TomTom you should see the COM4 option show up, and in GoogleMaps when you choose Use GPS, it should start searching for satellites. It may take some time. For some reason, the first time I used mine, it took longer than it ever did with the Sprint ROM but it did eventually start working. With the stock ROM, there was no COM4 in TomTom and Google Maps would return an error saying something like "No GPS hardware found".