St. Aloysius Gonzaga Secondary School was established in 2001 in a holding school in Georgetown.  The new school was built at 2800 Erin Centre Boulevard and was opened and blessed in 2001.

It is part of Erin Meadows Multi-use Complex, a partnership between the City of Mississauga, the Mississauga Library System, and the board.  The advanced-concept building includes a substantial library and a community centre complete with swimming pool.  Students are able to access the community library and can use the community centre facilities as part of their program.

Gonzaga, which has over 1800 students, has a significant number of programs that accommodate academic and special needs students.  Integrated in the programs are Career Paths (vocational) program, ASD (Autism Spectrum Disorder) program, Advanced Placement (AP) program, and Extended French program for selected students across the board.

The school is across the street from Merciful Redeemer Parish so students can attend Mass at the church.  Some school retreats are held at the parish, and students are involved in many parish ministries and the parish’s Life Teen program