Taco Milagro is one of my favorite spots in town for a *relatively* healthy mexican meal. It's not your typical greasy tex-mex. Occasionally, it can be ridiculously crowded and almost club-like (Thursday nights seem to be the worst), but the rest of the time it is a great spot for a night out with the girls or a relaxed week night dinner. They have amazing sangria swirl and mango margaritas, but most importantly an impressive gluten free selection!
The managers are extremely knowledgable about gluten as one of the owners has Celiac disease. When I asked about food allergies (they actually have a sign up near the register telling you to ask) they were so helpful and let me know that EVERYTHING on their menu, with the exception of the flour tortillas and the hamburger buns (kids menu), is gluten free. They also knew all about cross-contamination.