was established as a Grammar School in 1841, and was privately run for over 30 years.

In 1874, the local School Board purchased a site at the corners of Picton Street, Wellington Street, and Elgin Avenue in Goderich, and opened the new G.D.C.I.

There have been several additions, such as the West Gym which was added in 1965, along with the Technical wing and the library.

The latest renovations include the science labs and geography rooms which were added in 1990, as well as a complete redesign to expand the library.

[1] The front foyer and main office had extensive renovations in 2005 to enlarge the student services area incorporate the main office into what was the board room and a portion of the front foyer.