Australia's largest co-educational boarding school, Geelong Grammar School provides for some 1650 girls and boys on its four campuses, including the renowned Timbertop Year 9 campus in the foothills of the Victorian Alps. Boarding is available from Years 5 to 12 with a weekly boarding option available in middle school (Years 5 to 8). The 800 boarders come from all states of Australia and 25 other countries. The distinctive living and learning experience at Geelong Grammar School encourages its students to commit to do one's best in all fields of endeavour, a spirit of self confidence, of tolerance and mutual respect for others and a social conscience to serve the community.
Geelong Grammar School offers the International Baccalaureate Diploma Programme to students in Years 11 and 12 as an alternative to the Victorian Certificate of Education. Subjects available within the diploma Programme depend on the demand of the students.