Following the 2016 Board of Trustees Election, the SGHS Board of Trustees made up of 5 parent representatives comprises:
- Mrs Karen Purdue
- Mrs Victoria O'Connell
- Mr Grant Dermody
- Mr Peter Flannery
- Mr Nathan Haywood
- Mrs Robyn Welsh - Staff Representative
The Principal, Mrs Yvonne Browning is also a Board member. Student Representative, Miss Katelin Cotter competes the Board membership.