They have a gluten free bun. It comes packaged separately from the burger. They do not have a dedicated fryer for gluten free items. The chocolate and vanilla custard are gluten free and they were willing to use a new scoop just in case. The cashiers were hit and miss on knowledge. One was great and knew a lot, but the other one didn't know much and didn't ask for help. There is an online allergen search for Culver's that was really helpful to read before going. They do not have that info in stores.