Joe Perrella, the owner of the chain, was kind enough to respond to an e-mail of mine. The GF pizza crust is baked with a baking sheet underneath, however they will stop short of guaranteeing that it is celiac safe due to the proximity of flour in the air and area. I have had the pizza and did not experience symptoms, and it was very tasty. There is a GF penne that is prepared in a separate area and is a safe bet for celiacs according to Joe. Their white sauce and all salads (minus croutons and bread on the side) is all safely GF. The red sauce is kept with meatballs, which contain gluten. They are willing to call this gluten-friendly but not celiac friendly. Overall it's very tasty and definitely recommend.
They offer two gluten-free crust options, 1 is a 10’’ cauliflower crust and than a 12’’ gluten-free crust which I think is the Udi’s crust. I LOVE the 12’’ it is super yummy, but we had to ask them to cook it lightly because, the first time they brought it out to us it was too burnt to eat. They said that they make it more burnt because they’ve got complaints that the middle is too doughy if they don’t. So if you’re like me and don’t like crispy pizza just make sure to order it cooked lightly. Very good pizza!
We’ve ordered from Sammy’s 3 times and I’ve had a contamination reaction twice. If we ordered in person, maybe there would be less contamination, but I am not willing to keep trying and hoping for the best at this point. Pizza is pretty good, but it’s not the safest for celiacs.