I’m not gonna doxx Myself so I did some research on NSW instead

https://education.nsw.gov.au/schooling/parents-and-carers/choosing-a-school-setting/selective-high-schools/choosing-a-school/selective-high-schools

There are 17 fully selective high schools in NSW. Only high potential and gifted students can be enrolled in these schools through the selective high school application processes.

There are 27 partially selective high schools in NSW for entry in Year 7.

These schools have a mix of local area high school students who attend non-selective classes, and students placed through the selective high school placement processes who attend selective classes together.

https://en.wikipedia.org/wiki/List_of_selective_high_schools_in_New_South_Wales