Adjective for 3 Canadian provinces on the Gulf of St. Lawrence
[DOC] [TLE] Gulf of Saint Lawrence | gulf, Canada | Britannica.com [PAR] It fringes the shores of half the provinces of Canada and is a gateway... ... Gulf of 
Saint Lawrence, body of water covering about 60,000 square miles ... annually at 
Cap-aux-Meules in the Magdalen Islands) but also from three great gateways.