Restaurant	Address (*Multiple Locations)	Google Rating	Type of Offerings
Citrus	Passeig de Gràcia, 44, 08007 Barcelona, Spain	3.8	Mediterranean
Chocolat Factory SL	​Carrer d'Amigó, 53, 08021 Barcelona, Spain(*)	3.3	Chocolate/Dessert
Copasetic Barcelona	Carrer de la Diputació, 55, 08015 Barcelona, Spain	4.6	American
Conesa Entrepans	​Carrer de la Llibreteria, 1, 08002 Barcelona, Spain	4.5	Sandwiches
Mammamia	​Carrer de Pallars, 230, 08005 Barcelona, Spain	4.3	Italian​
Il Piccolo Focone	Carrer del Dos de Maig, 268, 08025 Barcelona, Spain	4.3	Italian
La Lluna	Calle Santa Anna, 20, 08002 Barcelona, Spain	4.1	Spanish
La Fonda	Carrer dels Escudellers, 10, 08002 Barcelona, Spain	3.6	Spanish
Gut	​Carrer del Perill, 13, 08012 Barcelona, Spain	4.4	Spanish/90% Gluten Free Menu
Els Pollos de Llull	Carrer de Nàpols, 272, 08025 Barcelona, Spain	3.9	Chicken/Dedicated Fryer
Bar Mut	​Carrer de Pau Claris, 192, 08037 Barcelona, Spain	3.7	Seafood/Catalan Focused

Disclaimer: Based on my experiences and research, all of the above can accommodate gluten-free/Celiacs. However, I am not responsible for any cross-contamination that may occur, and please always remember to remind your server of your allergy/preference.