We have a camper and spend each summer at Old Orchard Beach. as the previous review states, the owner's daughter was diagnosed with celiac; so they take it seriously.
I have eaten here dozens of times and have never had an issue with cross-contamination.
it is the perfect spot to get the pier-style food. in addition to pizza, they have GF buns. also, their chili is GF, so you can get a GF chili cheese dog, which I recommend.
I also recommend the sausage and peppers. they also are a great choice for breakfast, and cheap too. I usually get a n egg/sausage/cheese sandwich.