Yes, pure, distilled vermouth, usually made with a wine base and herbs, is considered naturally gluten-free. However, be on the lookout for hidden gluten in vermouths that add flavorings or other additives after distillation. There is also a risk for gluten cross-contact in facilities that process products containing wheat, barley, or rye. Read more at Answers from a Dietitian.
Common Brands of Vermouth: