The come-to-you team would be really preferred - essentially anyone who has experience with the GT. One of the dicey steps (for the inexperienced) is removal of the lower IP. While not difficult to get off, it has to be handled with great care. The middle part (above the START button) is only about 1" wide and if you don't handle it carefully it will want to fold there - creating a crease in the leather that you'll never get rid of. This piece must come completely out of the car and then back in again after the passenger airbag is replaced. The driver's side airbag is a piece of cake.
I watched the roaming team of two guys do a friend's GT - and these guys were REALLY good, respectful and careful.