Many people use that little storage compartment for either CD's, a small flashlight, tissues, etc. Since the glove box is essentially useless it's so small i could barley fit my users manual in it, I just put everything in the center counsel (where your arm goes). As for mounting a GPS unit in the place of the dash council, I've heard nothing but bad things about trying to fit anything where that storage compartment is. I'd just leave it as is, and if you REALLY want an external GPS, to just mount it on the windshield, or on top of the dash.
I hope you enjoy your 07 !
I hope you enjoy your 07 !