Jamal
I have a question that arose this last week, from a dead battery and having to unfortunately get a California Smog certification at the same time. My battery went dead. It was 6 years old. I used the dash board trickle charger device provided with the car all the time. Are there any external battery terminals on the GT that a standard Battery Tender Jr. can be connected to use a standard battery trickle like charger connected to an AC outlet? Right now the only other option ofr continuous low voltage charging is to remove the batter cover under the front compartment and connect charger leads directly to the battery terminals. Perhaps in the engine compartment there are bolts or terminals that could be used? Once the battery is exchanged, the onboard computer and O2 sensors need to be reset, and this take a lenghty drive at 60 MPH to solve the reset the sensors, with the tank between 1/4 and 3/4s full of petrol.
http://www.fordgtforum.com/forums/showthread.php?24792-California-GT-Smog-Story
I understand that Kendall/Cooltech LLC has an elegant solution for your needs.