St. Gerard High School was opened in September 1947, with an enrollment of forty-three freshmen and sophomores.

The grounds of the former school were inundated by up to 4 feet (1.2 m) of water during the historic August 2016 flooding of south Louisiana and the buildings were subsequently demolished in the same year.

The vacant land was donated to Cristo Rey High School who installed temporary buildings on the site.

Former State Representative and Louisiana Board of Regents member Vic Stelly taught and coached at Redemptorist during the early 1960s.

[3] Actress Donna Douglas (The Beverly Hillbillies), then known as Doris Smith, attended St. Gerard's High School.