If you love great fries with your burger, Five Guys is the place to go. They do not currently have a GF bun option but you can get your burger in a lettuce wrap or on a bed of lettuce as a bowl. They only cook russet fries in their fryer so there is no cross contamination from breaded products - and they serve huge portions. Let them know you have a gluten allergy when ordering and request special handling. I love their choose-your-options custom soft drink dispenser. Just a note for all Five Guys locations, they have free shelled peanuts in open containers and use peanut oil for their fries so if you have a peanut allergy, they are not a safe space for you.