Gluten-Free is on the menu, but the same kitchen also prepares what you avoid, so cross-contamination is possible. Tell staff what you react to, and ask how your dish is prepared before you order.
The Brigittenau branch of Vevi on the Leithastraße in Vienna, a Vietnamese kitchen that says all its dishes are 100 percent plant-based, with seitan and soy in place of meat and a selection of gluten free dishes on the menu. Tell the staff about other allergies, the kitchen has the final word.