I go to Jersey Mike's every couple of weeks for a quick grab-and-go. I usually order through the app. So it's usually prepared before I get there. Anytime I happen to get there before my food is prepared, they always ask me if it's a gluten allergy, and they always take tremendous care by wiping down surfaces, changing gloves, etc.
For a guy who generally despises chain restaurants, Jersey Mike's is my favorite chain restaurant.
— Very
— Gluten-free items are marked on the main menu
— Most/All
— Excellent