Directions to Centre Commercial Grand Quartier (Saint-Grégoire) with public transportation · Bus: 12 14 C4 · Train: K3. . $57 night. Géant Casino5 locals recommend. Spadium Saint Grégoire3 locals recommend Rennes 2 and Business School. Show all. Géant Casino Chic and sober apartment in the center of Saint-Gregoire. Individual Host. The Autorité de la concurrence clears the acquisition of the Géant Casino hypermarket of Saint-Grégoire (Brittany) Rennes, the Autorité, in. Aquatonic Rennes3 locals recommend. Leclerc SAINT GREGOIRE7 locals recommend. (). Nearby. Located at the northern entrance to Rennes, this site connects two major shopping centres – The Centre Saint-Grégoire and Grand Quartier – at the heart of a.