It's a co-ed school.
Our school has the dubious distinction of being the first one in the country to establish grade websites, with the GHS2001 and Girra2002 sites leading the way.
It's because at our school, the dynamic seems a lot more conductive towards grade unity - in my year (class of 2002), everybody was divided into smaller groups, but each of those groups got along perfectly fine with each other. When we lost our classmate, most students from every group in our grade were in attendance at her funeral - two years after the end of school - from the curries to the skips, the asian nerds to the musos, all united by the loss of our classmate and friend.
At Ruse or Baulko, you may get what could arguably be called a better education. But at Girraween, you learn life skills, and develop friendships with people you never would have expected to - and those friends will be with you for many years to come. It may sound stupid, but I value these friendships far more than I do my UAI, and I don't regret for a second not going to Baulko or Ruse.