| RETURN TO LEAGUE LISTING | |||||||||||
| Year | Division | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 1919/20 | Southern League Div 1 | Gillingham | 0-0 | Portsmouth | 0 | 1 | 0 | 0 | 0 | ||
| Southern League Div 1 | Portsmouth | 4-0 | Gillingham | 0 | 0 | 1 | 0 | 4 | |||
| 1914/15 | Southern League Div 1 | Gillingham | 3-1 | Portsmouth | 1 | 0 | 0 | 3 | 1 | ||
| Southern League Div 1 | Portsmouth | 1-0 | Gillingham | 0 | 0 | 1 | 0 | 1 | |||
| 1913/14 | Southern League Div 1 | Gillingham | 0-1 | Portsmouth | 0 | 0 | 1 | 0 | 1 | ||
| Southern League Div 1 | Portsmouth | 0-0 | Gillingham | 0 | 1 | 0 | 0 | 0 | |||
| 1912/13 | Southern League Div 1 | Gillingham | 2-0 | Portsmouth | 1 | 0 | 0 | 2 | 0 | ||
| Southern League Div 1 | Portsmouth | 2-1 | Gillingham | 0 | 0 | 1 | 1 | 2 | |||
| 1910/11 | Southern League Div 1 | Gillingham | 1-0 | Portsmouth | 1 | 0 | 0 | 1 | 0 | ||
| Southern League Div 1 | Portsmouth | 2-0 | Gillingham | 0 | 0 | 1 | 0 | 2 | |||
| 1909/10 | Southern League Div 1 | Gillingham | 2-0 | Portsmouth | 1 | 0 | 0 | 2 | 0 | ||
| Southern League Div 1 | Portsmouth | 4-3 | Gillingham | 0 | 0 | 1 | 3 | 4 | |||
| 1908/09 | Southern League Div 1 | Gillingham | 2-3 | Portsmouth | 0 | 0 | 1 | 2 | 3 | ||
| Southern League Div 1 | Portsmouth | 1-1 | Gillingham | 0 | 1 | 0 | 1 | 1 | |||
| 1907/08 | Southern League Div 1 | Gillingham | 1-3 | Portsmouth | 0 | 0 | 1 | 1 | 3 | ||
| Southern League Div 1 | Portsmouth | 5-2 | Gillingham | 0 | 0 | 1 | 2 | 5 | |||
| 1906/07 | Southern League Div 1 | Gillingham | 2-0 | Portsmouth | 1 | 0 | 0 | 2 | 0 | ||
| Southern League Div 1 | Portsmouth | 3-1 | Gillingham | 0 | 0 | 1 | 1 | 3 | |||
| 1905/06 | Southern League Div 1 | Gillingham | 0-1 | Portsmouth | 0 | 0 | 1 | 0 | 1 | ||
| Southern League Div 1 | Portsmouth | 4-0 | Gillingham | 0 | 0 | 1 | 0 | 4 | |||
| 1904/05 | Southern League Div 1 | Gillingham | 0-3 | Portsmouth | 0 | 0 | 1 | 0 | 3 | ||
| Southern League Div 1 | Portsmouth | 1-1 | Gillingham | 0 | 1 | 0 | 1 | 1 | |||
| 1903/04 | Southern League Div 1 | Gillingham | 1-2 | Portsmouth | 0 | 0 | 1 | 1 | 2 | ||
| Southern League Div 1 | Portsmouth | 2-0 | Gillingham | 0 | 0 | 1 | 0 | 2 | |||
| 1902/03 | Southern League Div 1 | Gillingham | 1-0 | Portsmouth | 1 | 0 | 0 | 1 | 0 | ||
| Southern League Div 1 | Portsmouth | 4-0 | Gillingham | 0 | 0 | 1 | 0 | 4 | |||
| 1901/02 | Southern League Div 1 | Gillingham | 2-0 | Portsmouth | 1 | 0 | 0 | 2 | 0 | ||
| Southern League Div 1 | Portsmouth | 3-0 | Gillingham | 0 | 0 | 1 | 0 | 3 | |||
| 1900/01 | Southern League Div 1 | Gillingham | 2-0 | Portsmouth | 1 | 0 | 0 | 2 | 0 | ||
| Southern League Div 1 | Portsmouth | 3-1 | Gillingham | 0 | 0 | 1 | 1 | 3 | |||
| 1899/00 | Southern League Div 1 | Gillingham | 1-0 | Portsmouth | 1 | 0 | 0 | 1 | 0 | ||
| Southern League Div 1 | Portsmouth | 5-1 | Gillingham | 0 | 0 | 1 | 1 | 5 | |||