The only thing they fry is fries, nothing else is fried there. Let them know you have an allergy and they take precautions for your burger. It'll take a little longer, but worth it. Everything is fried in peanut oil, so not peanut allergy safe at all and if you're not used to peanut oil you may find yourself gassy/bloated but it's not from gluten since they only fry fries. I have celiac and wheat allergy and I've never gotten sick there.