I have celiac disease. I've eaten here at least 10 times. Have not had any issues with getting glutened. Just be sure to ask what foods on the buffet are gluten free.
I love Brazz. It's my favorite restaurant in Charlotte. It's a Brazilian steakhouse, rodizio style, where you get ten meats served at your choice of temperature. The food is unmatched. The service is great and they are wonderful people.