Welcome to St. Gregory School. As you leaf through the public pages and learn more about St. Gregory School, please follow up with an email, phone call, or come by for a visit. St. Gregory School is a Catholic school located in the heart of downtown San Mateo, California. We serve a diverse community providing a traditional Catholic education for over 60 years. From algebra to spanish, phonics to music and PE to religion, our California-credentialed community of learners in kindergarten to the 8th grade, benefit the Catholic tradition of excellence in education. Thank you for giving us a look and we look forward to meeting you in the future.