They have gluten free items marked on their menu with a star. I wasn't asked about anything related to my order, literally at all, so you would definitely need to ask specifically about any precautions you might need them to take.
I didn't have a reaction, but the food was not worth it. Basically none of the meat (or even tofu) was seasoned and their bulgogi taco was practically inedible.
— Not very
— Gluten-free items are marked on the main menu
— Some
— Poor