There is a poster listing all the possible allergens in each crepe from their menu. Though all the crepes are made out of rice flour, but not all the toppings are gluten-friendly, such as nuts. You can still explicitly order to be gluten-free just so the servers know and make sure your order is gluten-free.
According to their website, they prevent cross-contamination by freshly making each order and keeping ingredients separate from each other.
— Somewhat
— Separate gluten-free menu
— Some
— Excellent