Their fries have their own fryer. We bought our own gluten free buns and just ordered burgers/hot dogs bunless and brought them home and put on the buns we got. Neither of us got sick but i wouldn’t say they are gluten friendly just if your careful you can still enjoy. I would still call however if you have questions.
As far as i know it’s just the fries. But if you add the cheese it’s also safe from cross/contamination. But not the cheese on the burgers.
— Somewhat
— Not Much
— Excellent