St. Aloysius Gonzaga Secondary School is a Catholic high school located in the Erin Mills community of Mississauga, Ontario, named after Saint Aloysius Gonzaga. The school opened in Mississauga in 2001, after spending a year as a holding school in Georgetown. It is a joint venture between the city of Mississauga and the Dufferin Peel Catholic District School Board. The school is a multi-use facility, attached to the Erin Meadows Community Centre and Erin Meadows Library, which is part of the Mississauga Library System. St.