I think that is why we are suggesting adding a tracker, in order to transmit the location the GPS is receiving. I assume the two would need to communicate, but maybe not. It could be that a tracker (or tracking device) has both rx and tx capabilities and the GPS could be used for it's original intent, receiving satellite signals and converting the data to map datum info such as speed.
That said, a gauge really is not needed. Just a tracker discreetly mounted on the Jeep, similar to lojac but using satellite signals instead.
Never mind me, carry on LOL.