We ended up going to Chapeau after the one local gluten free restaurant was closed. It was a welcome surprise after having a hard time finding food and getting “glutened” earlier in the day. The menu has a few sections marked gluten free (options) and a separate sign outside mentioned a few more items. All burger options can be served on a pretty decent gluten free bun, pasta dishes can be served with gluten free spaghetti, all salads are gluten free, and they also have gluten free falafel and lentils. I already feel sick from this morning, so I can’t say for 100% sure that there are no issues, but I felt safe. The wait staff seemed to have a good understanding which has thus far been rare in Germany.