They will cook food separate to ensure there is no cross contamination. I have never gotten sick at any of their locations.
Very accommodating for gluten free diners. They do have tamari, just have to ask for it. Most of the sushi rolls can be turned into a gluten free version, so don't be hesitant to ask. Don't forget that imitation crab is not gf, so make sure to not include it in your special order.
They do not have a gluten free menu, but they were very helpful in working with me to find options. Obviously anything with soy sauce or ponzu sauce contains gluten as well as anything fried. Most raw rolls and sushi are ok, just check with sauces. The white fish sushi comes with ponzu sauce on top, but they can easily leave it off. They do have gluten free soy sauce available, so just ask.