According to the Canadian newspaper
The Catholic Register, it is a private Catholic high school.
The Catholic Register article notes that the Quebec Minister of Education ordered Loyola High School to use the mandatory Ethics and Religious Culture course because its intent is to foster tolerance and dialogue. In response, Marie Bourque, vice president of the Association of Catholic Parents of Quebec, claimed that Loyola’s course was more comprehensive, examined the historical roots of various faiths and their philosophical underpinnings. Loyola’s course also brought in a Muslim iman and a Jewish rabbi to explain their beliefs.
Whether or not to appeal the ruling will be made after a thorough study of the court’s decision:
catholicregister.org/news/canada/item/15542-quebec-school-ruling-another-blow-to-catholic-education