They understand when you tell them allergy when ordering a gluten free pizza. Make sure to mention it is an allergy so they know to put it on a safe aluminum pan to bake. They prepare the gluten free pizzas in a separate area away from the regular ones. When I asked for a box the server first boxed up the regular pizzas and said she would go wash her hands and be back to do mine. Good pizza as well! They are up front on the menu about potential for cross contamination because it is a pizza place and they are trying to cover themselves but they are the safest pizza place I have eaten at both at this location, in Portsmouth and Portland.