We stopped in for dinner Sunday evening and confirmed with the counter staff that everything was GF except the mac salad and chow mein noodles as others have said. I tried the Kilauea and Honolulu chicken with rice, sauteed veggies, and spam misubi and enjoyed it all. The spam misubi was great to have again--it's been so long! The Kilauea chicken was a bit overcooked, but the sauce, veggies, and rice made up for it. It's not the best Hawaiian food I've ever had but was great to have a counter restaurant option while traveling, take home leftovers for another safe meal, and not have any reactions. Their website also mentions they're restaurants are nut-free if that's a concern for you.
— Very
— No gluten-free information on the menu
— Some
— Average