Despite people on the mainland telling me that Five Guys is reliable for GF options, I was told that NOTHING in the restaurant is gluten free. Repeatedly, on a couple of different visits, and even asking for manager confirmation. They we're emphatic that nothing was safe for me. However, I decided to risk trying the fries because it didn't seem they had any ingredients with gluten and were in their own fryer, and I did not have any reaction (I've had them three times since). Besides, the peanuts and certain sodas are gluten free too. Cross contamination can always be an issue since they have buns in the building, but I think that risk could be minimized if the staff are willing to take a few precautions.
They use peanut oil for those with nut allergies; they offer complementary in-shell peanuts and ask you not to take them outside. Buns are toasted on its own separate grill so no cross over. Burgers are doubled and fries are okay. You should say you are gluten intolerant. They will offer lettuce wrap in lieu of no bun. Ordered "all the way" and didn't have a reaction to condiments/toppings. Did not put GF friendly but they will accommodate GF as much as possible.
I eat at five guys constantly as they are always careful with my allergy. For the first time ever at a five guys I got glutened at this one. I didn’t eat the mayonnaise cause it had obviously been scooped out of a container that had gluten in it and put into a ramekin. I guess the other condiments were also cross contaminated as I became very sick. They might be good sometimes but this crew did not take it seriously.
Had an entire procedure, changed gloves, and assured me they follow allergy/gluten guidelines seriously. Fries are entirely gluten free and have their own fryer! Got an iceberg bun and it was juicy and delicious. Always nice to find a fast food option that’s safe. Did not get sick! Would recommend.