If you're in need of something quick, their burgers can be made GF. The only thing cooked on the grill are burgers, so you can get any burger without a bun. For me, the best option to ensure no cross contamination or confusion, is to order their low carb thickburger. It originally comes without a bun, and wrapped in lettuce. I brought my own GF bun, and it was great! Unfortunately, the burgers are the only thing that can be made GF.
I've ordered the low carb thick burger as mentioned on a gluten free website. It means it is wrapped in lettuce instead of bun. It was yummy. I don't eat lettuce so ask them for a fork. Prior to that I had the bacon burger with no bun. One day I asked if fries were cooked in seperate oil and they said the fries have separate fryer machine. Fries are good too. I've had their hashbrowns several times and their bunless burgers and fries several times with no problems. Soy is my biggest digestive issue and I've had no problems at the Ardmore, Tennessee location. My gluten issues are not primarily digestive (bloating and mental fog) so hope this helps you decide whether to visit. Employees are always very kind. I've only been through drive through recently; no dining in. There is a 2020 Allergen menu on the Hardee's corporate website.
Manager was so nice, informative, and helpful. The Manager made sure that everything was sterilized before starting on our order and gloves were changed. All burgers can be changed over to a lettuce wrap and the fries have a dedicated fryer so no cross contamination. Will definitely be going there more often.