I've visited many times and never gotten sick. I haven't always had the most knowledgeable server, however they always let the kitchen staff know and, as I said, I never got sick. So I think it's pretty safe.
At the time I visited, a few things on the menu were marked that either were or could be done gluten-free. My favorite was probably the shrimp tacos.
— Very
— Gluten-free items are marked on the main menu
— Some
— Excellent