Premiership History
| GPS Results (official competition from 2015 onwards) | ||
| 1st | 2nd | |
| 1988 | TSC | |
| 1989 | NC/TSC | |
| 1990 | NC | |
| 1991 | NC | |
| 1992 | TSC | |
| 1993 | TSC | |
| 1994 | TSC | |
| 1995 | TSC | NC/TSC |
| 1996 | NC/TSC | |
| 1997 | TSC | TSC |
| 1998 | TSC | |
| 1999 | NC | |
| 2000 | SIC | |
| 2001 | NC | TSC |
| 2002 | TSC | TSC |
| 2003 | NC | |
| 2004 | TSC | NC |
| 2005 | TSC | TSC |
| 2006 | SIC | SJC |
| 2007 | NC | NC |
| 2008 | SIC | SJC |
| 2009 | SIC | |
| 2010 | SIC | |
| 2011 | SIC | TSC/SIC |
| 2012 | NC | |
| 2013 | NC | NC |
| 2014 | NC | NC |
| 2015 | NC | NC |
| 2016 | TSC | NC |
| 2017 | TSC | NC |
| 2018 | NC/TSC | NC/TSC/Shore |
| 2019 | NC | Shore |
| 2020 | NC | TSC |
| 2021 | NC | NC |
| GPS CAS Combined Results | ||
| 1st | 2nd | |
| 1988 | TSC | |
| 1989 | WC | NC/TSC |
| 1990 | NC | |
| 1991 | NC | |
| 1992 | TSC | |
| 1993 | WC | TSC |
| 1994 | TGS | TSC |
| 1995 | TSC | NC/TSC |
| 1996 | TGS | NC |
| 1997 | TSC | TSC/TGS |
| 1998 | TSC | TGS |
| 1999 | WC | NC |
| 2000 | SIC | |
| 2001 | NC | TSC |
| 2002 | TSC | TSC |
| 2003 | WC | NC |
| 2004 | TSC | NC |
| 2005 | TSC | TSC |
| 2006 | TGS | SJC |
| 2007 | NC | NC/SAC |
| 2008 | SIC | SJC |
| 2009 | SAC | SIC |
| 2010 | SAC | SIC |
| 2011 | SIC | TSC/SIC |
| 2012 | NC | CS |
| 2013 | NC | NC |
| 2014 | NC | NC |
| 2015 | NC | NC |
| 2016 | TSC/SAC | NC |
| 2017 | NC | NC |
| 2018 | NC/TSC | NC/TSC |
| 2019 | NC | Shore |
| 2020 | KGS/NC | TSC |
| 2021 | NC | NC |
| Legend: | ||
| King’s | TKS | |
| Newington | NC | |
| High | SBHS | |
| Scots | TSC | |
| Shore | E | |
| St Ignatius’ | SIC | |
| St Joseph’s | SJC | |
| Trinity | TGS | |
| Waverley | WC | |
| Barker | BC | |
| Cranbrook | CS | |
| St Aloysius | SAC | |
| Knox | KGS | |
Prior to 2015 the AAGPS and CAS only recognised the winners of the Combined Competition as the Premiers. Post 2015 the competition changed into a three trophy CAS/GPS/Combined CAS/GPS.
*Water Polo was not recognised as an official GPS sport until 2015.
Water Polo in unique within the sporting environment of AAGPS – competition includes its foundation schools from both the GPS & CAS. The current competition has a dual Premierships for 1st and 2nd Grade, a Combined Schools Premiership (can be won by either GPS or CAS) and since 2015 an AAGPS Premiership. Game points from each fixture are attributed to both competition tables.