To get to the Final Four, you must get through the quarterfinals or Elite Eight first. The GMCT is no exception. The table below contains the past member schools that have reached the Greater Middlesex Conference Boys Basketball Tournament Elite Eight from the inaugural season of GMC Hoops in 1998-99 up and through the present.
Past Greater Middlesex Conference Tournament Elite Eight Teams Since 1999
| Year | Champion | Runner-Up | Semifinalist | Semifinalist | Quarterfinalist | Quarterfinalist | Quarterfinalist | Quarterfinalist |
| 1999 | St. Joseph’s | Colonia | Sayreville | Perth Amboy | Highland Park | St. Peter’s | Piscataway | St. Mary’s |
| 2000 | Sayreville | Carteret | Colonia | East Brunswick | North Brunswick | Piscataway | St. Joseph’s | South Brunswick |
| 2001 | Colonia | St. Joseph’s | Carteret | East Brunswick | South Brunswick | New Brunswick | Piscataway | Middlesex |
| 2002 | Carteret | Colonia | South Brunswick | New Brunswick | Piscataway | Sayreville | Highland Park | Old Bridge |
| 2003 | Cardinal McCarrick | St. Joseph’s | New Brunswick | South Plainfield | Perth Amboy | Old Bridge | Sayreville | Colonia |
| 2004 | South Plainfield | Colonia | Cardinal McCarrick | St. Joseph’s | New Brunswick | Piscataway | J.P. Stevens | Sayreville |
| 2005 | South Plainfield | St. Joseph’s | Colonia | South Brunswick | Cardinal McCarrick | New Brunswick | Piscataway | Old Bridge |
| 2006 | Colonia | Metuchen | St. Joseph’s | Monroe | South Brunswick | New Brunswick | East Brunswick | Old Bridge |
| 2007 | Piscataway | Cardinal McCarrick | South Brunswick | South Plainfield | Colonia | East Brunswick | Bishop Ahr | Old Bridge |
| 2008 | Cardinal McCarrick | St. Joseph’s | Piscataway | Colonia | J.P. Stevens | Bishop Ahr | Carteret | South Amboy |
| 2009 | Piscataway | St. Joseph’s | Cardinal McCarrick | Monroe | Colonia | Bishop Ahr | Sayreville | J.P. Stevens |
| 2010 | St. Joseph’s | Monroe | Spotswood | Sayreville | East Brunswick | New Brunswick | Cardinal McCarrick | North Brunswick |
| 2011 | St. Joseph’s | Piscataway | Bishop Ahr | Cardinal McCarrick | East Brunswick | Perth Amboy | South Brunswick | J.F. Kennedy |
| 2012 | St. Joseph’s | North Brunswick | East Brunswick | South Brunswick | Cardinal McCarrick | Monroe | New Brunswick | Piscataway |
| 2013 | St. Joseph’s | East Brunswick | North Brunswick | Woodbridge | Carteret | Spotswood | Sayreville | Old Bridge |
| 2014 | St. Joseph’s | East Brunswick | Sayreville | North Brunswick | Colonia | Spotswood | Woodbridge | South Amboy |
| 2015 | Colonia | St. Joseph’s | Perth Amboy | East Brunswick | South Brunswick | Carteret | Woodbridge | Sayreville |
| 2016 | St. Joseph’s | South Brunswick | Woodbridge | East Brunswick | Colonia | Sayreville | Old Bridge | Spotswood |
| 2017 | St. Joseph’s | Sayreville | South Brunswick | Woodbridge | Old Bridge | Carteret | Piscataway | J.F. Kennedy |
| 2018 | St. Joseph’s | Colonia | Old Bridge | Carteret | Piscataway | Bishop Ahr | Edison | Perth Amboy |
| 2019 | St. Joseph’s | Piscataway | Colonia | New Brunswick | Old Bridge | Bishop Ahr | Carteret | Monroe |
| 2020 | St. Thomas Aquinas | South Brunswick | St. Joseph’s | Edison | Carteret | Colonia | Dunellen | Old Bridge |