St. Gregory opened in 1998 and was blessed on June 10,1998. The school population of approximately 460 students reflects a diverse, caring and inclusive community of learners. The school's motto, "We Care, We Share, We Dare!" encourages students to strive for excellence and empowers them to be confident and independent life-long learners. The school is involved in numerous community and social justice intiatives. The Youth Faith Ambassador program models faith and leadership through monthly assemblies, food drives, sponsorship of families at Christmas, and the faith development of their peers. The school strives to teach its students to be stewards of faith and of the earth. St. Gregory, Pope and Doctor of the Church, called himself a servant of God. His feast day is celebrated on September 3rd.

Taken and referenced from Dufferin-Peel Catholic District School Board, "Our Story. Our Tradition. Our Journey.", 2011