Had a chocolate milkshake with no issues! I like Page's!
I inquired about their gluten free options and they said none were available.
Page Dairy Mart has wonderful, rich and creamy soft serve that is also gluten free. The vanilla or chocolate soft serve is GF, and eaten plain in a cup has never once given me a reaction. However, be aware that the special flavored soft serve, shakes, arctic swirls, and so forth are all made using shared equipment. I haven't had the Hawaiian shaved ice in years, but it would also be GF.