 The Gulf of Saint Lawrence is bounded on the north by the Labrador Peninsula and Quebec, to the east by Saint-Pierre and Newfoundland, to the south by the Nova Scotia peninsula and Cape Breton Island, and to the west by the Gaspe Peninsula, New Brunswick, and Quebec.As for significant islands the Gulf of Saint Lawrence contains Anticosti Island, Prince Edward Island, Îles-de-la-Madeleine, Cape Breton Island, Saint Pierre Island, and Miquelon-Langlade.Half of the ten provinces of Canada adjoin the Gulf