I'm not certain why this restaurant is listed on a gluten free site. As delicious as it is, they are not gluten free friendly unless you happen to stop by when the one gluten free soup is available.
Giacomo's, in my opinion, has one of the best atmospheres in the downtown Bangor area. They have a great selection of coffee, as well as a variety of salads. Any of their sandwich selections can be served as a salad, and they occasionally have a gluten free soup selection as well. If you're lucky, they might have GF whoopie pies in stock baked by local Irish Daisy Bakery.