So, the bunless burger was delicious (burger patty and toppings atop a beef of shredded lettuce and diced tomato)! I had the Sweet & Spicy Burger (jalapenos are not GF), and the honey-citrus cole slaw. It was a "warm" late December day, so the outdoor seating wasn't bad if you had a jacket (55 degrees).
When I ordered at the counter, I specifically stated I had a severe gluten allergy (I'm Asymptomatic Celiac, but it's easier to explain with allergy), and the cashier was doing a lot of tapping on the screen.
There are a decent amount of GF options on the GF menu. My food came out on a breaker plate, and everyone else's came out on stainless steel trays lined with paper.
But, there was a torn French fry piece on my plate, underneath the lettuce. Since I'm Asymptomatic Celiac, I won't notice from this small amount, but I still don't appreciate being glutened. No telling if they accidentally put a whole serving of greasy fries on my plate before they realized they didn't belong there... So, just be careful, and maybe be more verbal than I was (make a slightly bigger deal about it).
— Not very
— Separate gluten-free menu
— Some
— Excellent