So many Denver breweries it's hard to keep track. I'm 90% sure they do, and they didn't suck. I think someone in their family is gluten free, so they have multiple choices.
They are big on gluten free / reduced beers. Great Frontier Brewing Company on Untappd https://untappd.com/w/great-frontier-brewing-company/220787
You'll have to contact them, but when I was there a few months ago, they didn't.
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