The staff was well informed and accommodating. I chose my ice cream flavor, they confirmed it was GF, and since I told them I have celiac they opened a new pint and brought out a new scoop to prevent cross contamination. They also informed me that machines are washed between flavors during production.
Update: finally decided to test with my Nima sensor and two of the three flavors (I bought pints) tested positive for gluten.
— Not at all
— Some
— Good