Glenunga International High School (GIHS), formerly Glenunga High School (GHS), is a publicly-funded international school in Adelaide, South Australia. It is located approximately 4 km (2.5 mi) south-east of the Adelaide city centre in the suburb of Glenunga, between L'Estrange and Conyngham Streets, adjoining the major thoroughfare Glen Osmond Road. The school serves the surrounding suburbs of the cities of Unley, Burnside and the Adelaide Hills. Glenunga offers the Ignite program for gifted students as well as the IB Diploma Programme. As of 2022 the principal is Wendy Johnson.