Catholic co-educational secondary in Castle Hill, NSW; 1307 students, Years 7–12.
NAPLAN averaging 25 points above national year-level averages; the result is a B overall.
Gilroy Catholic College is also known as GCC Castle Hill.
5 HSC Top Achievers — #34 of 240 New South Wales schools.
Gilroy Catholic College has an overall SchoolRank score of 56.3/100, rated "Average". This score is calculated from academic results, student growth, wellbeing, programs, and value for money. Academically, the school grades B+ (Good) against other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1096 (83rd percentile; the national average is 1,000).
In 2025 NAPLAN testing at Gilroy Catholic College, Year 7 students averaged 567 across the tested NAPLAN domains, above the national average of 540 for that year level, and Year 9 students averaged 591, above the national average of 569 for that year level. Relative to national year-level averages, the school's strongest domain is Writing. 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.
Gilroy Catholic College is a large Catholic secondary school with approximately 1,307 students. It offers education for years 7-12. As a Catholic school, enrolment typically involves an application process. Contact the school directly for enrolment criteria, waiting lists, and open day information.
Gilroy Catholic College has approximate annual tuition fees of $4,866. Actual fees may vary by year level, and additional costs for uniforms, camps, and extracurricular activities typically apply. The school grades B (Average) for value for money, which weighs academic results against the cost of attendance.
Gilroy Catholic College has a student-to-teacher ratio of 14.2:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 18% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 92%, which is good.
In the 2025 HSC, 3 students at Gilroy Catholic College were all-round achievers, with results in the top band across 10 or more units. The school had 5 top achiever places across 2025 HSC courses. 90% of students received a university offer.
Gilroy Catholic College is located in Castle Hill, NSW, in a major city. Its ICSEA is 1096 (83rd 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.