Great experience! When I ordered the gluten free bun, it came separately sealed, so it wouldn't get confused with the regular buns. On my sandwhich it was also clearly labeled gluten allergy.
Chick-fil-A offers gluten free grilled chicken nuggets and many locations have dedicated fryers for fries. Check with your location if cross-contamination is a concern for you.
My wife and I have ordered here many times. Like all Chick-fil-A locations, options are limited - fries, grilled nuggets, a grilled chicken sandwich with a GF bun - but we've never had any issues here.
They're often very busy, but get lines moved through quickly. We've found ordering in the app for pickup the fastest way to get your food.
It's a super clean location right off the highway. The staff member I spoke with was very helpful and informative while I was ordering. She knew the procedure for the fryer. I decided to be extra cautious and have a cup of fruit instead of fries, but the GF bun came wrapped separately and was delicious.