I eat a salad or a bowl at Jason’s about once a month. There is a Gluten Sensitive menu with disclaimers for Celiac. The meal comes with a lid with a gluten sensitive label. I am usually fine after eating there. Once I had slight symptoms that might have been cross contact.
They have a dedicated GF menu which includes chicken tenders (which I never get to have, so it’s a treat) and have always been EXTREMELY careful about my diet