They do a nice job with a good number of options and nice touches like GF bread to substitute for the baguette on the cheese plate. There is no substitute for the popovers, which are a signature item but there may not be much to be done about that.
The staff lacks training - our waitress last night was clueless about the allergy and what was safe to order. There is only one entree on the menu that is celiac friendly - the chicken. It is very good, just more options would be nice. All the chowders and stews were also GF. There is also the option of a salad (remind them no croutons). Avoid the lunchtime crowds and come for dinner. There are much better places to eat (for those with celiac) but it is part of the Acadia experience eating here. Note: I rated it celiac friendly because the chefs handle the prep well, and I've never gotten sick here. However, be very clear with the servers about your allergy needs.
There were some gluten free options but a little pricey. The staff needs training. The view is amazing