
1945
The Roscommon Estate was purchased by Fr John Garvey on behalf of the Diocese of Townsville, with Fr David OMeara appointed Parish Priest to establish a school on the grounds. Plans for a Christian Brothers School for Boys were first recorded, with additional land acquired in Ingham and surrounding districts for this purpose.







�E1980
On 22 October, a public meeting was held to discuss a proposed Senior High School. A committee was formed, and a feasibility study was conducted, with reports presented in March and June 1981.
1981
Two demountable classrooms were erected for the scholastic year, costing $4,988. One classroom served as a Domestic Science room for Santa Maria girls, while the other was used as a homeroom for Year 10 Gilroy boys. Students from Cardwell were also transported to Gilroy using a newly acquired college bus.
1982
Further improvements were made at the Colleges at a cost of $30,078. Works included enclosing Gilroys undercroft to create a new classroom, converting the former music room into a multi-purpose space, and enclosing the verandas of the Manual Arts block to provide additional storage. Finances were computerised, and all grades became fully co-educational.

1985
In June, the Schools Commission approved a grant of $495,000 for new development, with tenders called in July. The district contributed the remaining $200,000, shared among the Ingham, Halifax, and Abergowrie parishes, reflecting strong local support for the project.
1986
The first Year 11 class commenced, with 75 students enrolled in April. The Year 11 and 12 extension was officially blessed and opened on 19 April by Bishop Raymond Benjamin, with celebrations including a dinner at the Royal Hotel and participation by Senator Margaret Reynolds. Fr David OMeara passed away in Ireland on 15 June.

1992
The Student Representative Council (SRC) was established, giving students a formal voice in school activities and decision-making.
1998
The upper refurbished floor of G-Block was officially opened by Mr Bob Katter and blessed by Father Ferlazzo.
2002
The All-Purpose Hall was completed and dedicated on 11 October, providing a versatile space for school events.
2008
Year 12 students were awarded the Queensland Certificate of Education (QCE) for the first time.
2009
Gilroy Santa Maria College celebrated its 60th Jubilee, with the refurbished college chapel blessed and officially opened as part of the anniversary celebrations.
