The folks over at PhoneNews have a How To article on adding GPS functions to your HTC Mogul, XV6800 and other similar variants. By installing the update you will the gpsOne chipset in your device to function as a standard GPS device. The gpsOne is compatible with Windows Mobile GPS applications including Google Maps, Windows Live for Mobile, and TomTom Navigator.
Keep in mind that if you install this update you will most certainly void your warranty.
Keep in mind that if you install this update you will most certainly void your warranty.