They have an allergy protocol. One of the young ladies working there was not aware but another one told her exactly what to do. They use gloves, mix your ice cream on a separate pan, use fresh ice cream and rinse off scoops under running water. My daughter is also dairy free and they had a few options for her too.
The staff was knowledgeable about which menu items were gluten free. When I told them I was celiac, they assured me they'd use fresh utensils and they prepared the ice cream on a separate clean space at the end of the assembly line. They have a large variety of gluten free ingredients, although I know the risk of cross contamination is pretty high with the food containers all set so closely together. Their understanding and precautions made me feel comfortable enough to try it, though.