The only thing you can be sure is gluten free are their buns. You have to look everything else up on a separate site because their app doesn't tell you and it's pretty vague and confusing. This lead me to getting the spicy GRILLED chicken sandwich thinking it was gf like the regular and I was glutened. I went back and checked later to realize it's not on their "probably doesn't contain gluten but who actually knows" list. It is a plus that they fry their fries separately, though, and they are generally safe.
— Somewhat
— No gluten-free information on the menu
— Not Much/None
— Average