The prep for their gf pizza is separate but the cross contamination occurs as they use the same ovens to cook the regular and gf pizza. Probably could have them build the pizza and then cook it at home. If your a Celiac expect a reaction if you eat here.
It is not dedicated gluten free so there is most likely risk of cross contamination. I have Hashimotos not Celiac so I was okay with that. But they have a delicious gluten free pizza made to order. They also have dessert pizzas such as cinnamon sugar, blueberry (without crumb topping) and strawberry cream. The manager offered to look up each topping for me to verify that it did not contain gluten.