Gilroy Catholic College is a Roman Catholic comprehensive co-educational secondary day school located in Castle Hill, in the Hills District of Sydney, New South Wales, Australia.

The College provides a Catholic and general education for students from Year 7 through to Year 12 and is administered by the Catholic Education Office of the Diocese of Parramatta.

Gilroy Catholic College was founded in 1980 and was built on the land formerly belonging to St Gabriel's School for the Hearing Impaired, thus using existing buildings.

[2] Gilroy Catholic College was named after Cardinal Sir Norman Thomas Gilroy, the first cardinal born in Australia.

[2] On 9 February 2008, The Sydney Morning Herald reported that, according to Green Party analysis of government figures, Gilroy received $12.2 million more in federal government funding than its entitlement under the socioeconomic status (SES) formula.