The alcohol in Hierbas is a result of the distillation of wines and Molasses.
There is no gluten in the various herbs,none in grapes or Molasses;from sugar cane.
Apparently gluten can't make it through the distillation process which is why hard liquor made from grain,like whisky,is gluten free.
So,unless there is a 'secret ingredient' it looks ok.
This is only from what I've read and I'm not a doctor....