| At Reading (42) | At Gillingham (42) | Overall (84 matches) | ||||||||
| Results | Total | % | Results | Total | % | Results | Total | % | ||
| Reading | 23 | 54.76 | Gillingham | 24 | 57.14 | Reading | 31 | 36.9 | ||
| Gillingham | 12 | 28.57 | Reading | 8 | 19.05 | Gillingham | 36 | 42.86 | ||
| Draws | 7 | 16.67 | Draws | 10 | 23.81 | Draws | 17 | 20.24 | ||
| Goals | Total | Av.pg | Goals | Total | Av.pg | Goals | Total | Av.pg | ||
| Reading | 79 | 1.88 | Gillingham | 75 | 1.79 | Reading | 120 | 1.43 | ||
| Gillingham | 45 | 1.07 | Reading | 41 | 0.98 | Gillingham | 120 | 1.43 | ||
| Records | |||||
| Highest Aggregate | 8 | Reading | 6 - 2 | Gillingham | 1936/1937 |
| Highest Reading score: | 6 | Reading | 6 - 2 | Gillingham | 1936/1937 |
| Highest Gillingham score: | 5 | Gillingham | 5 - 1 | Reading | 1954/1955 |
| Season | Date | Home | Score | Away | Competition |
| 2002/2003 | Sat 09 Nov | Gillingham | 0 - 1 | Reading | League Division One |
| 1999/2000 | Fri 07 Apr | Reading | 2 - 2 | Gillingham | League Division Two |
| Mon 03 Jan | Gillingham | 2 - 2 | Reading | League Division Two | |
| 1998/1999 | Thu 01 Apr | Gillingham | 2 - 1 | Reading | League Division Two |
| Sat 17 Oct | Reading | 0 - 0 | Gillingham | League Division Two | |
| 1995/1996 | Sat 06 Jan | Reading | 3 - 1 | Gillingham | F.A. Cup |
| 1988/1989 | Sat 22 Apr | Reading | 1 - 2 | Gillingham | Third Division |
| Sat 24 Sep | Gillingham | 0 - 1 | Reading | Third Division | |
| 1985/1986 | Sat 29 Mar | Gillingham | 3 - 0 | Reading | Third Division |
| Wed 01 Jan | Reading | 1 - 2 | Gillingham | Third Division | |
| 1984/1985 | Tue 14 May | Reading | 0 - 2 | Gillingham | Third Division |
| Tue 23 Oct | Gillingham | 4 - 1 | Reading | Third Division | |
| 1982/1983 | Sat 16 Apr | Reading | 0 - 0 | Gillingham | Third Division |
| Tue 28 Sep | Gillingham | 1 - 0 | Reading | Third Division | |
| 1981/1982 | Tue 18 May | Gillingham | 2 - 1 | Reading | Third Division |
| Sat 05 Sep | Reading | 3 - 2 | Gillingham | Third Division | |
| 1980/1981 | Wed 12 Nov | Reading | 0 - 1 | Gillingham | Third Division |
| Tue 19 Aug | Gillingham | 2 - 0 | Reading | Third Division | |
| 1979/1980 | Sat 12 Jan | Gillingham | 1 - 1 | Reading | Third Division |
| Sat 01 Sep | Reading | 1 - 3 | Gillingham | Third Division | |
| 1976/1977 | Sat 22 Jan | Reading | 1 - 2 | Gillingham | Third Division |
| Sat 21 Aug | Gillingham | 2 - 2 | Reading | Third Division | |
| 1973/1974 | Sat 30 Mar | Gillingham | 0 - 1 | Reading | Fourth Division |
| Sat 03 Nov | Reading | 0 - 1 | Gillingham | Fourth Division | |
| 1972/1973 | Sat 10 Mar | Reading | 3 - 1 | Gillingham | Fourth Division |
| Sat 14 Oct | Gillingham | 1 - 0 | Reading | Fourth Division | |
| 1971/1972 | Sat 04 Mar | Gillingham | 4 - 2 | Reading | Fourth Division |
| Sat 13 Nov | Reading | 1 - 2 | Gillingham | Fourth Division | |
| 1970/1971 | Sat 17 Oct | Reading | 3 - 2 | Gillingham | Third Division |
| Sat 15 Aug | Gillingham | 0 - 0 | Reading | Third Division | |
| 1969/1970 | Wed 08 Oct | Reading | 1 - 0 | Gillingham | Third Division |
| Sat 16 Aug | Gillingham | 1 - 3 | Reading | Third Division | |
| 1968/1969 | Thu 26 Dec | Gillingham | 2 - 2 | Reading | Third Division |
| Fri 04 Oct | Reading | 3 - 2 | Gillingham | Third Division | |
| 1967/1968 | Sat 03 Feb | Reading | 3 - 1 | Gillingham | Third Division |
| Sat 23 Sep | Gillingham | 3 - 0 | Reading | Third Division | |
| 1966/1967 | Sat 15 Apr | Gillingham | 0 - 2 | Reading | Third Division |
| Sat 19 Nov | Reading | 2 - 1 | Gillingham | Third Division | |
| 1965/1966 | Wed 23 Mar | Gillingham | 2 - 4 | Reading | Third Division |
| Wed 15 Sep | Reading | 2 - 2 | Gillingham | Third Division | |
| 1964/1965 | Mon 19 Apr | Reading | 3 - 0 | Gillingham | Third Division |
| Fri 16 Apr | Gillingham | 2 - 1 | Reading | Third Division | |
| 1957/1958 | Sat 12 Apr | Reading | 4 - 0 | Gillingham | Third Division (South) |
| Sat 30 Nov | Gillingham | 2 - 1 | Reading | Third Division (South) | |
| 1956/1957 | Sat 06 Apr | Gillingham | 0 - 0 | Reading | Third Division (South) |
| Sat 24 Nov | Reading | 4 - 0 | Gillingham | Third Division (South) | |
| 1955/1956 | Sat 31 Dec | Gillingham | 2 - 0 | Reading | Third Division (South) |
| Sat 03 Sep | Reading | 1 - 2 | Gillingham | Third Division (South) | |
| 1954/1955 | Sat 22 Jan | Gillingham | 5 - 1 | Reading | Third Division (South) |
| Sat 11 Sep | Reading | 2 - 2 | Gillingham | Third Division (South) | |
| 1953/1954 | Sat 19 Dec | Reading | 0 - 1 | Gillingham | Third Division (South) |
| Sat 22 Aug | Gillingham | 3 - 0 | Reading | Third Division (South) | |
| 1952/1953 | Sat 04 Apr | Reading | 3 - 2 | Gillingham | Third Division (South) |
| Sat 15 Nov | Gillingham | 2 - 1 | Reading | Third Division (South) | |
| 1951/1952 | Sat 19 Jan | Reading | 2 - 1 | Gillingham | Third Division (South) |
| Sat 15 Sep | Gillingham | 1 - 1 | Reading | Third Division (South) | |
| 1950/1951 | Tue 26 Dec | Reading | 1 - 1 | Gillingham | Third Division (South) |
| Mon 25 Dec | Gillingham | 0 - 3 | Reading | Third Division (South) | |
| 1937/1938 | Sat 07 May | Reading | 2 - 0 | Gillingham | Third Division (South) |
| Wed 15 Sep | Gillingham | 1 - 2 | Reading | Third Division (South) | |
| 1936/1937 | Sat 27 Feb | Reading | 6 - 2 | Gillingham | Third Division (South) |
| Sat 24 Oct | Gillingham | 2 - 1 | Reading | Third Division (South) | |
| 1935/1936 | Sat 18 Jan | Gillingham | 2 - 0 | Reading | Third Division (South) |
| Sat 14 Sep | Reading | 1 - 0 | Gillingham | Third Division (South) | |
| 1934/1935 | Sat 05 Jan | Gillingham | 1 - 1 | Reading | Third Division (South) |
| Sat 01 Sep | Reading | 3 - 0 | Gillingham | Third Division (South) | |
| 1933/1934 | Sat 06 Jan | Reading | 2 - 0 | Gillingham | Third Division (South) |
| Sat 02 Sep | Gillingham | 5 - 1 | Reading | Third Division (South) | |
| 1932/1933 | Mon 17 Apr | Reading | 4 - 0 | Gillingham | Third Division (South) |
| Fri 14 Apr | Gillingham | 4 - 1 | Reading | Third Division (South) | |
| 1931/1932 | Sat 07 May | Reading | 2 - 0 | Gillingham | Third Division (South) |
| Wed 02 Sep | Gillingham | 1 - 1 | Reading | Third Division (South) | |
| 1925/1926 | Sat 06 Feb | Reading | 1 - 0 | Gillingham | Third Division (South) |
| Sat 26 Sep | Gillingham | 4 - 1 | Reading | Third Division (South) | |
| 1924/1925 | Sat 28 Mar | Gillingham | 0 - 0 | Reading | Third Division (South) |
| Sat 22 Nov | Reading | 0 - 1 | Gillingham | Third Division (South) | |
| 1923/1924 | Sat 09 Feb | Reading | 4 - 0 | Gillingham | Third Division (South) |
| Sat 02 Feb | Gillingham | 1 - 0 | Reading | Third Division (South) | |
| 1922/1923 | Sat 24 Mar | Gillingham | 2 - 1 | Reading | Third Division (South) |
| Sat 17 Mar | Reading | 1 - 1 | Gillingham | Third Division (South) | |
| 1921/1922 | Sat 25 Feb | Gillingham | 2 - 0 | Reading | Third Division (South) |
| Sat 18 Feb | Reading | 2 - 1 | Gillingham | Third Division (South) | |
| 1920/1921 | Wed 08 Sep | Gillingham | 1 - 0 | Reading | Third Division |
| Wed 01 Sep | Reading | 1 - 2 | Gillingham | Third Division | |