We stayed at BWI in May and needed gluten free meals for my DH. The only thing offered in the Bellevue lounge for a gluten free breakfast was a pre-packed fresh fruit cup or whole fruit, bananas, etc. At the Boardwalk Bakery, they offered frozen gluten free muffins that they heated up in the microwave...not so good. We made a trip to BabyCakes Gluten free bakery in Downtown Disney and got several days worth of breakfast treats to store in our room. We would get our coffee in the Bellevue Lounge and bring it outside on the Boardwalk to have with our BabyCakes treats every day.
We also brought a box of gluten free cereal with us to have in the room before or after coffee.
We found that the Boardwalk Bakery could make any sandwich offered on gluten free bread. The chef from Kouzzina would come out to talk with us, then would go back and hand make the sandwich. We had several great gluten free turkey sandwiches for lunch!