GGH meaning in Regional ?

The Golden Horseshoe is a secondary region of Southern Ontario, Canada, which lies at the western end of Lake Ontario, with outer boundaries stretching south to Lake Erie and north to Lake Scugog and Lake Simcoe. It includes the Greater Toronto Area and adjacent upper-tier municipalities with substantial urban agglomerations. The region is the most densely populated and industrialized in Canada. With a population of 7,826,367 people in its core and 9,245,438 in its greater area, the Golden Horseshoe accounts for over 21 percent of the population of Canada and more than 55 percent of Ontario's population. It is part of the Quebec City–Windsor Corridor, itself part of the Great Lakes Megalopolis.

The core of the Golden Horseshoe starts from Niagara Falls at the eastern end of the Niagara Peninsula and extends west, wrapping around the western end of Lake Ontario at Hamilton and then turning northeast to Toronto (on the northwestern shore of Lake Ontario), before finally terminating at Clarington in Durham Region. The term Greater Golden Horseshoe is used to describe a broader region that stretches inland from the core to the area of the Trent–Severn Waterway, such as Peterborough, in the northeast, to Barrie and Lake Simcoe in the north, and to the Grand River area, including centres such as Brantford, Waterloo Region, and Guelph to the west. The extended region's area covers approximately 33,500 km2 (13,000 sq mi), out of this, 7,300 km2 (2,800 sq mi) or approximately 22 per cent of the area is covered by the environmentally protected Greenbelt. The Greater Golden Horseshoe forms the neck of the Ontario Peninsula.