Glenunga International High School is a selective-entry government secondary known for a progressive, inquiry-led approach paired with academic intensity.
NAPLAN well above the national average at every tested year level; the result is an A- overall.
Glenunga International High School is a selective-entry government secondary known for a progressive, inquiry-led approach paired with academic intensity. Its flagship is the International Baccalaureate Diploma Program; students also access specialist streams including Ignite and vocational pathways, plus support through The Learning Hub. The school's signature is its thriving performing arts culture, musical theatre and an annual Music Gala drawing 300+ student performers, making it a strong fit for musically gifted learners alongside those seeking rigorous, globally minded study.
Glenunga International High School is also known as GIHS, GIHS Glenunga and Glenunga International HS.
Glenunga International High School draws students from the Glenunga International High School (and 1 more zone).
Glenunga International High School has an overall SchoolRank score of 70.8/100, rated "Excellent". This score is calculated from academic results, student growth, wellbeing, programs, and value for money. Academically, the school grades A− (Excellent) against other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1153 (96th percentile; the national average is 1,000).
In 2025 NAPLAN testing at Glenunga International High School, Year 7 students averaged 617 across the tested NAPLAN domains, well above the national average of 540 for that year level, and Year 9 students averaged 633, well above the national average of 569 for that year level. Relative to national year-level averages, the school's strongest domain is Numeracy. National averages are specific to each year level, because NAPLAN scores are scaled so older year levels score higher. A school-wide average can't be compared with a single national figure.
Glenunga International High School is a large government secondary school with approximately 2,340 students. It offers education for years 7-12. As a government school, enrolment is generally available to students living within the school's designated catchment zone. Families outside the zone may apply for out-of-area placement subject to availability.
Glenunga International High School is not a selective school as a whole, but it runs a test-entry Ignite program alongside its regular intake. Entry is through the ACER Ignite assessment. The main entry point is Year 7. Applications go through the official state process, and entry cutoff marks are not published.
Glenunga International High School is a government school, so there are no tuition fees. Families may be asked to contribute to voluntary school fees covering materials, excursions, and activities. The school grades A (Excellent) for value for money, which weighs academic results against the cost of attendance.
Glenunga International High School has a student-to-teacher ratio of 14.9:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 22% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 93%, which is excellent.
The Year 12 completion rate is 100%.
Glenunga International High School is located in Glenunga, SA, in a major city. Its ICSEA is 1153 (96th percentile; the national average is 1,000). ICSEA measures the advantage of a school's community, from its parents' education and occupation, not the school's quality. A school with a lower ICSEA and strong academic results may be teaching particularly effectively.