They mark a few non-sushi items as gluten free on their menu. But, most of their sushi is also available gluten free even if not marked. Just avoid anything fried or with tempura - and tell them you have a gluten allergy. They also have gf soy sauce but you need to separately ask for it. I've eaten here multiple times and never gotten sick.
— Somewhat
— Gluten-free items are marked on the main menu
— Most/All
— Excellent