So these are eating establishments which have printed menus specifically indicating GF ingredients/concerns or they are verified as being able to understand what you are talking about if you ask for GF food. For now, in no particular order:
Longhorn
Outback
P.F. Changs
Pei Wei
Carrabas
Bonefish
Elephant Walk ( they are in the Boston area and I actually heard my first “Gluten Free” radio ad by them on 10/7/08. They actually said “Gluten Free” as a description of dishes they serve. Historical-like! )
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Your local Thai restaurant can likely make you Pad Thai gluten free if you can easily talk with them…