I used to work at a local craft brewery that did a contract beer for a different brewer. It was labeled at Gluten Free.
But new regulations, regarding beer, were put in place so now, legally, beer cannot be labeled at Gluten Free under any circumstances.
**Unless
1. The ingredients are Gluten Free.
2. The gluten free ingredients are housed in a separate facility as the regular ingredients.
3. The beer is brewed on separate brewing equipment with no cross contamination.
4. There are regular inspection by the federal gluten police. Just like the inspector that comes in monthly to certify Organic ingredients.
Needless to say, they canceled that contract because all of these requirements were completely impossible.