A bit risky, but I've taken the chance on 3 occasions with no concerns. They have a dedicated fryer and do gluten free burgers and loaded fries which are excellent. They can't guarantee no cross contamination, but they are serious about taking precautions. They have "GF" beer options on tap, but their lines can cross so they're not safe for Coeliacs. Service is hit and miss and some staff are much more knowledgeable than others.
They have gf wings! The waitress was really kind and took me very seriously, marking my order as a severe allergy. She told me they prepare the gf stuff separately and I felt quite safe. For some reason the cauliflower wings are not called gluten free on the menu but on the website, but I was assured they make them with gf flour and sparkling water, not actual beer (“Bierteig”). They also have one gf beer. Though they gave the usual cross contamination warning.