| RETURN TO LEAGUE LISTING | |||||||||||
| Year | Division | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 2001/2002 | English Division 1 | Gillingham | 1-0 | Millwall | 24/03/2002 | 1 | 0 | 0 | 1 | 0 | |
| English Division 1 | Millwall | 1-2 | Gillingham | 24/11/2001 | 1 | 0 | 0 | 2 | 1 | ||
| 1999/2000 | English Division 2 | Millwall | 2-2 | Gillingham | 24/04/2000 | 0 | 1 | 0 | 2 | 2 | |
| English Division 2 | Gillingham | 2-0 | Millwall | 02/10/1999 | 1 | 0 | 0 | 2 | 0 | ||
| 1998/1999 | English Division 2 | Millwall | 3-3 | Gillingham | 30/01/1999 | 0 | 1 | 0 | 3 | 3 | |
| English Division 2 | Gillingham | 1-1 | Millwall | 29/12/1998 | 0 | 1 | 0 | 1 | 1 | ||
| 1997/1998 | English Division 2 | Millwall | 1-0 | Gillingham | 07/03/1998 | 0 | 0 | 1 | 0 | 1 | |
| English Division 2 | Gillingham | 1-3 | Millwall | 01/11/1997 | 0 | 0 | 1 | 1 | 3 | ||
| 1996/1997 | English Division 2 | Millwall | 0-2 | Gillingham | 26/04/1997 | 1 | 0 | 0 | 2 | 0 | |
| English Division 2 | Gillingham | 2-3 | Millwall | 19/10/1996 | 0 | 0 | 1 | 2 | 3 | ||
| 1984/1985 | English Division 3 (old) | Millwall | 2-1 | Gillingham | 23/03/1985 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 (old) | Gillingham | 1-4 | Millwall | 06/10/1984 | 0 | 0 | 1 | 1 | 4 | ||
| 1983/1984 | English Division 3 (old) | Millwall | 2-2 | Gillingham | 19/02/1984 | 0 | 1 | 0 | 2 | 2 | |
| English Division 3 (old) | Gillingham | 3-3 | Millwall | 29/10/1983 | 0 | 1 | 0 | 3 | 3 | ||
| 1982/1983 | English Division 3 (old) | Millwall | 4-1 | Gillingham | 30/01/1983 | 0 | 0 | 1 | 1 | 4 | |
| English Division 3 (old) | Gillingham | 1-0 | Millwall | 11/09/1982 | 1 | 0 | 0 | 1 | 0 | ||
| 1981/1982 | English Division 3 (old) | Gillingham | 1-1 | Millwall | 12/03/1982 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 (old) | Millwall | 1-2 | Gillingham | 24/10/1981 | 1 | 0 | 0 | 2 | 1 | ||
| 1980/1981 | English Division 3 (old) | Millwall | 0-0 | Gillingham | 20/04/1981 | 0 | 1 | 0 | 0 | 0 | |
| English Division 3 (old) | Gillingham | 1-2 | Millwall | 26/12/1980 | 0 | 0 | 1 | 1 | 2 | ||
| 1979/1980 | English Division 3 (old) | Millwall | 2-0 | Gillingham | 29/12/1979 | 0 | 0 | 1 | 0 | 2 | |
| English Division 3 (old) | Gillingham | 1-1 | Millwall | 25/08/1979 | 0 | 1 | 0 | 1 | 1 | ||
| 1975/1976 | English Division 3 (old) | Gillingham | 3-1 | Millwall | 21/02/1976 | 1 | 0 | 0 | 3 | 1 | |
| English Division 3 (old) | Millwall | 2-2 | Gillingham | 15/11/1975 | 0 | 1 | 0 | 2 | 2 | ||
| 1965/1966 | English Division 3 (old) | Millwall | 2-0 | Gillingham | 05/02/1966 | 0 | 0 | 1 | 0 | 2 | |
| English Division 3 (old) | Gillingham | 1-0 | Millwall | 28/08/1965 | 1 | 0 | 0 | 1 | 0 | ||
| 1961/1962 | English Division 4 | Millwall | 0-0 | Gillingham | 10/02/1962 | 0 | 1 | 0 | 0 | 0 | |
| English Division 4 | Gillingham | 3-1 | Millwall | 23/09/1961 | 1 | 0 | 0 | 3 | 1 | ||
| 1960/1961 | English Division 4 | Gillingham | 1-2 | Millwall | 27/12/1960 | 0 | 0 | 1 | 1 | 2 | |
| English Division 4 | Millwall | 1-2 | Gillingham | 26/12/1960 | 1 | 0 | 0 | 2 | 1 | ||
| 1959/1960 | English Division 4 | Gillingham | 3-1 | Millwall | 20/02/1960 | 1 | 0 | 0 | 3 | 1 | |
| English Division 4 | Millwall | 3-3 | Gillingham | 03/10/1959 | 0 | 1 | 0 | 3 | 3 | ||
| 1958/1959 | English Division 4 | Millwall | 2-0 | Gillingham | 20/12/1958 | 0 | 0 | 1 | 0 | 2 | |
| English Division 4 | Gillingham | 1-2 | Millwall | 23/08/1958 | 0 | 0 | 1 | 1 | 2 | ||
| 1957/1958 | English Division 3 South | Gillingham | 1-0 | Millwall | 23/04/1958 | 1 | 0 | 0 | 1 | 0 | |
| English Division 3 South | Millwall | 3-1 | Gillingham | 17/03/1958 | 0 | 0 | 1 | 1 | 3 | ||
| 1956/1957 | English Division 3 South | Millwall | 2-1 | Gillingham | 09/02/1957 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 South | Gillingham | 1-3 | Millwall | 29/09/1956 | 0 | 0 | 1 | 1 | 3 | ||
| 1955/1956 | English Division 3 South | Millwall | 5-0 | Gillingham | 14/01/1956 | 0 | 0 | 1 | 0 | 5 | |
| English Division 3 South | Gillingham | 4-3 | Millwall | 10/09/1955 | 1 | 0 | 0 | 4 | 3 | ||
| 1954/1955 | English Division 3 South | Gillingham | 1-1 | Millwall | 19/02/1955 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 South | Millwall | 3-2 | Gillingham | 02/10/1954 | 0 | 0 | 1 | 2 | 3 | ||
| 1953/1954 | English Division 3 South | Millwall | 3-1 | Gillingham | 26/12/1953 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Gillingham | 2-0 | Millwall | 25/12/1953 | 1 | 0 | 0 | 2 | 0 | ||
| 1952/1953 | English Division 3 South | Millwall | 3-1 | Gillingham | 03/01/1953 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Gillingham | 0-1 | Millwall | 30/08/1952 | 0 | 0 | 1 | 0 | 1 | ||
| 1951/1952 | English Division 3 South | Millwall | 3-1 | Gillingham | 31/03/1952 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Gillingham | 1-1 | Millwall | 18/08/1951 | 0 | 1 | 0 | 1 | 1 | ||
| 1950/1951 | English Division 3 South | Millwall | 4-3 | Gillingham | 30/12/1950 | 0 | 0 | 1 | 3 | 4 | |
| English Division 3 South | Gillingham | 4-3 | Millwall | 02/09/1950 | 1 | 0 | 0 | 4 | 3 | ||
| 1937/1938 | English Division 3 South | Millwall | 5-0 | Gillingham | 19/02/1938 | 0 | 0 | 1 | 0 | 5 | |
| English Division 3 South | Gillingham | 2-3 | Millwall | 09/10/1937 | 0 | 0 | 1 | 2 | 3 | ||
| 1936/1937 | English Division 3 South | Gillingham | 1-0 | Millwall | 01/05/1937 | 1 | 0 | 0 | 1 | 0 | |
| English Division 3 South | Millwall | 3-0 | Gillingham | 21/09/1936 | 0 | 0 | 1 | 0 | 3 | ||
| 1935/1936 | English Division 3 South | Gillingham | 1-3 | Millwall | 28/03/1936 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Millwall | 4-1 | Gillingham | 23/11/1935 | 0 | 0 | 1 | 1 | 4 | ||
| 1934/1935 | English Division 3 South | Millwall | 3-2 | Gillingham | 17/09/1934 | 0 | 0 | 1 | 2 | 3 | |
| English Division 3 South | Gillingham | 1-3 | Millwall | 29/08/1934 | 0 | 0 | 1 | 1 | 3 | ||
| 1927/1928 | English Division 3 South | Gillingham | 0-1 | Millwall | 25/04/1928 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Millwall | 6-0 | Gillingham | 21/04/1928 | 0 | 0 | 1 | 0 | 6 | ||
| 1926/1927 | English Division 3 South | Gillingham | 2-1 | Millwall | 23/04/1927 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Millwall | 2-0 | Gillingham | 04/12/1926 | 0 | 0 | 1 | 0 | 2 | ||
| 1925/1926 | English Division 3 South | Millwall | 0-0 | Gillingham | 27/02/1926 | 0 | 1 | 0 | 0 | 0 | |
| English Division 3 South | Gillingham | 0-0 | Millwall | 17/10/1925 | 0 | 1 | 0 | 0 | 0 | ||
| 1924/1925 | English Division 3 South | Millwall | 2-0 | Gillingham | 02/05/1925 | 0 | 0 | 1 | 0 | 2 | |
| English Division 3 South | Gillingham | 1-0 | Millwall | 22/10/1924 | 1 | 0 | 0 | 1 | 0 | ||
| 1923/1924 | English Division 3 South | Millwall | 5-0 | Gillingham | 08/03/1924 | 0 | 0 | 1 | 0 | 5 | |
| English Division 3 South | Gillingham | 0-2 | Millwall | 01/03/1924 | 0 | 0 | 1 | 0 | 2 | ||
| 1922/1923 | English Division 3 South | Millwall | 3-1 | Gillingham | 26/12/1922 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Gillingham | 3-0 | Millwall | 25/12/1922 | 1 | 0 | 0 | 3 | 0 | ||
| 1921/1922 | English Division 3 South | Millwall | 1-0 | Gillingham | 10/12/1921 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Gillingham | 0-1 | Millwall | 14/09/1921 | 0 | 0 | 1 | 0 | 1 | ||
| 1920/1921 | English Division 3 (old) | Gillingham | 0-0 | Millwall | 30/10/1920 | 0 | 1 | 0 | 0 | 0 | |
| English Division 3 (old) | Millwall | 4-0 | Gillingham | 23/10/1920 | 0 | 0 | 1 | 0 | 4 | ||
| Year | Competition | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 2000/2001 | League Cup 2nd Rd | Gillingham | 2-1 | Millwall | 11/09/2001 | 1 | 0 | 0 | 2 | 1 | |
| 1998/1999 | AM Cup Semi-Final South | Millwall | 1-0 | Gillingham | 16/02/1999 | 0 | 0 | 1 | 0 | 1 | |
| 1988/1989 | League Cup 2nd Rd 2nd Leg | Gillingham | 1-3 | Millwall | 11/10/1988 | 0 | 0 | 1 | 1 | 3 | |
| League Cup 2nd Rd 1st Leg | Millwall | 3-0 | Gillingham | 27/09/1988 | 0 | 0 | 1 | 0 | 3 | ||
| 1983/1984 | AM Cup 1st Rd South | Millwall | 4-3 | Gillingham | 0 | 0 | 1 | 3 | 4 | ||
| 1972/1973 | League Cup 2nd Rd | Gillingham | 0-2 | Millwall | 0 | 0 | 1 | 0 | 2 | ||
| 1957/1958 | FA Cup 2nd Rd Replay | Gillingham | 6-1 | Millwall | 1 | 0 | 0 | 6 | 1 | ||
| FA Cup 2nd Rd | Millwall | 1-1 | Gillingham | 0 | 1 | 0 | 1 | 1 | |||
| 1895/1896 | FA Cup 2nd Qualifying Rd | Gillingham | 0-1 | Millwall Athletic | 0 | 0 | 1 | 0 | 1 | ||
| 1894/1895 | FA Cup 3rd Qualifying Rd | Gillingham | 0-2 | Millwall Athletic | 0 | 0 | 1 | 0 | 2 | ||