Called ahead to inquire about their practices, and was assured that they could do a burger or sandwich cooked on a separate frying pan with a GF bun. The server who took my order was unsure, but the manager came over to reassure me. My burger came out with grill marks so I took it back, the manager apologized profusely, and had them make it again. No immediate reaction, so fingers crossed!
— No gluten-free information on the menu