Please refer to the link above for the full NSW, Sydney public school catchment map. The above page also contain individual map for close to 500 schools as well. The original Google Map is no longer provided as I have stopped update it and it contain not up to date information, there are already twenty schools that I have updated which not included in the original map. It is no longer fare to provide that anymore, so I have removed the public access to it. Again please refer to the above link for the up to date catchment map for NSW, Sydney Public Schools. I have also shifted to a different mapping technology provider which is not free but provide service more in line with what I need compare to Google Map.
Sydney Public School Interactive Map
As usual we recommend you contact the school in question or Department of Education for the final confirmation.