FA Cup   M. W D L goals
  at home 2 0 0 2 2 : 8
  Away 1 0 1 0 1 : 1
  3 0 1 2 3 : 9
League Cup   M. W D L goals
  at home 3 1 0 2 2 : 4
  Away 6 1 1 4 7 : 11
  9 2 1 6 9 : 15
League One   M. W D L goals
  at home 6 5 0 1 15 : 5
  Away 6 1 2 3 5 : 7
  12 6 2 4 20 : 12
League Two   M. W D L goals
  at home 2 0 0 2 0 : 3
  Away 2 2 0 0 4 : 0
  4 2 0 2 4 : 3
EFL Trophy   M. W D L goals
  at home 2 0 0 1 0 : 1
  Away 2 1 0 0 3 : 2
  4 1 0 1 3 : 3
overall   M. W D L goals
  at home 15 6 0 8 19 : 21
  Away 17 5 4 7 20 : 21
  Neutral Place 0 0 0 0 0 : 0
  32 11 4 15 39 : 42
FA Cup
1992/1993 2. Round Colchester United - Gillingham FC 2:3
1992/1993 2. Round Gillingham FC - Colchester United 1:1
1984/1985 2. Round Colchester United - Gillingham FC 0:5
League Cup
2008/2009 1. Round Gillingham FC - Colchester United 0:1 (0:1)
1984/1985 1. Round Colchester United - Gillingham FC 0:2
1984/1985 1. Round Gillingham FC - Colchester United 3:2
1981/1982 1. Round Gillingham FC - Colchester United 1:1
1981/1982 1. Round Colchester United - Gillingham FC 2:0
1980/1981 1. Round Gillingham FC - Colchester United 2:1
1980/1981 1. Round Colchester United - Gillingham FC 0:2
1973/1974 1. Round Gillingham FC - Colchester United 4:2
1972/1973 1. Round Gillingham FC - Colchester United 1:0
League One
2015/2016 24. Round Gillingham FC - Colchester United 1:0 (0:0)
2015/2016 8. Round Colchester United - Gillingham FC 2:1 (2:1)
2014/2015 38. Round Gillingham FC - Colchester United 2:2 (0:0)
2014/2015 22. Round Colchester United - Gillingham FC 1:2 (0:2)
2013/2014 26. Round Colchester United - Gillingham FC 3:0 (0:0)
2013/2014 1. Round Gillingham FC - Colchester United 0:1 (0:0)
2009/2010 28. Round Gillingham FC - Colchester United 0:0 (0:0)
2009/2010 3. Round Colchester United - Gillingham FC 2:1 (1:1)
2005/2006 19. Round Colchester United - Gillingham FC 5:0 (1:0)
2005/2006 1. Round Gillingham FC - Colchester United 2:1 (0:0)
1999/2000 39. Round Colchester United - Gillingham FC 2:1
1999/2000 23. Round Gillingham FC - Colchester United 2:1
League Two
2023/2024 26. Round Colchester United - Gillingham FC 0:1 (0:0)
2023/2024 5. Round Gillingham FC - Colchester United 0:3 (0:0)
2022/2023 28. Round Colchester United - Gillingham FC 0:2 (0:2)
2022/2023 23. Round Gillingham FC - Colchester United 0:1 (0:1)
EFL Trophy
2022/2023 Group A South Gillingham FC - Colchester United 5:4 (1:1, 1:1) pso
2021/2022 Group A South Colchester United - Gillingham FC 0:1 (0:0)
2019/2020 Group A Gillingham FC - Colchester United 2:3 (1:1)
2014/2015 2. Round Colchester United - Gillingham FC 2:4 (2:1, 3:3) pso

For games that were decided on penalties the score after 120 minutes will be included in the ranking