There are gluten free buns available for burgers. Salad is also an option, just make sure you tell them no croutons. My waitress said she was 99% positive all the salad dressings were gluten free. She was super nice and answered all my questions. I had peel and eat shrimp and steamed clams, as I didn't feel like a burger or salad. But there are options. Curlys fries is right next door for some awesome gluten free fries.
We went here not knowing if anything they had was gf. Turns out, they offer gf buns/rolls! My mom and I ordered peel n eat shrimp and salads, and my dad also ordered a salad. They let us know if the dressing was gf. We had no problems. Also, the outside seating on the boardwalk is wonderful addition to the restaurant- it is shaded and has a nice view of the ocean.