They have a dedicated allergy blender. I forgot to tell them about my allergy before they made my smoothie but they remade it for me in the GF blender no problem. They were very accommodating. However, I did have some of the original smoothie before I realized and ended up getting glutened (totally my fault and not the facility’s), so make sure you do request the allergy blender.
Have a lot of gluten free smoothie options