Went to the Bay Street Biergarten with some friends (prepared to have limited options) and was very pleased by the friendly, knowledgable staff and GF options available to me. I ordered a chef salad and was advised about my dressing options; when I had a question the server asked the chef without delay. The salad was gigantic!! Honestly one of the best salads I've ever had out.... And I didn't order the salad because that was my only option, just that it was summer and a salad sounded good.
The server let me know that they had gluten free buns and many of the sandwiches/burgers were options for me as well.
Overall extremely happy and I would come back. The location has it's own parking lot which is another huge bonus in the market area of Charleston.