Everything can be ordered with gluten free bun and fries.
Gluten free bun available when ordering burger. Personalise burger using self service touch screen.
Big Mac sin gluten - why can't they do this outside Spain
It's McDonald's. You're not going to get a 100% risk free experience but if you're willing to take the risk of getting safe for a tasty, cheap hamburger- you got it.
As all mcdonalds restaurants in Spain, there are gluten free options with bun gluten free and fries