Yes in the pensionnat’s neighborhood. Said pensionnat is situated in Montreal (in France, near Carcassonne). Gaston stays with his parents at nights so the house should be near enough so he can go back home everyday.
That is really a very beautiful area to live, the Aude. From the picture we see from the princely family they very much enjoy the nature and tranquil life there. The young Dauphin and his siblings seem very much in their element.