I’ve been a couple times and felt reasonably safe. Their regular rice isn’t gf so be extremely clear that you need the gf accommodation due to an allergy. They don’t have a ton of gf sushi options, but the choices they do have are delicious. Also, they sometimes boil edamame in the same water as udon noodles, so if you want edamame, ask for them to be boiled in fresh water. Again, just be very clear about your allergy and you should be ok. They do mention at the bottom of their menu that sesame seeds could contain traces of wheat, and they put sesame seeds on EVERYTHING. I’d ask them to withhold sesame seeds.