I Would avoid St Josephs's college don't waste your money, After moving there from another BCE school, we were very disappointed in all aspects of this school and leadership. We gave it 2 years hoping it would improve (2021-2022) and disappointingly I think it got worse. Lots of bullying, discrimination towards students, ignored emails, and limited play areas
There is a new private school that opened in Coomera this year (2020) called St Josephs College, being brand new it is hard to compare it to the schools already mentioned however the parents who I have spoken to that have children attending the school are very happy.
In addition Picnic Creek State School is also a fairly new primary school in Coomera and Foxwell State College Coomera is a high school that also opened this year.
I would personally recommend Assisi Catholic College. I find the students there to be respectful and well behaved and each student I have encountered has enjoyed their time making memories at this lively and enjoyable school. Although there are many competitors (CAC, St Stephens, UCSC) I believe that Assisi tops them all.
Whatever you do avoid UCSC at all costs unless you want your kids to be beaten up and bullied or roaming the streets like mini gangs. I'd probably looks at schools at helensvale or private schools in the area.
Coomera Anglican is a great private school with big ovals and in a close vicinity of all major highways and Coomera hub. There is also st Stephan's but I personally think Coomera Anglican has a better criculum.
Ucsc would be the best choice for public as its queenslands largest public school.