The 2 dealers that have done the most work on 05/06 GT's appear to be Auto Nation Ford, Kevin Morgan service advisor in Scottsdale and Sanderson Ford in Glendale. As others have noted, be very specific what work you want done and what you want inspected or it is an open ticket for expensive repairs. Others may be able to give you a specific service advisor for Sanderson Ford.
I use Kevin Morgan at AutoNation and he always takes care of getting me in and out efficiently for recalls. Personally I wouldn't leave my GT overnight there although many people do - the cleanliness of the service area is not up to my standards. Their best GT tech left years ago so a fair amount of us locals use Rich 586-292-2788 - call him or send him a text and see what he can do for you.