In searching the East Coast for a Silver GT I found this White GT at a dealer in Rhode Island. Info is:
Rizzo Ford Inc.
North Providence, Rhode Island
There was no phone number listed, sorry. Hope this helps someone looking for a White one

 

There's also one, at least it's still listed on line, at Brandon Ford in Tampa, FLA.

 

Last week I saw two or three at Brandon Ford, but I am pretty sure they have a huge mark up on them, or why else would they still be on the lot?