Great Gulf, a reputable developer Great Gulf Developments is known to be one of GTA's most trusted developers. with a HUGE portfolio of Real Estate Development projects on scales never seen before. Registered as a Tarion Builder since December 16th, 1987 with 8000+ homes built around the GTA. Great Gulf Development's Experience From One Bloor Condos, which was once the largest building in Toronto which rises 75 stories and 732 units, that's Great Gulf! Being a developer that focuses all around Canada including Toronto, Guelph, Brampton, Missisauaga, Milton, Oakville, Edmonton, East Gwillimbury, Bradford to even West Palm Beach, Florida and more.