The season covered the period from 1 July 2017 to 30 June 2018.

As of 27 June 2017, Gillingham have announced nine pre-season friendlies against Faversham Town, Dartford, Dover Athletic, Chatham Town, Ipswich Town, Patro Eisden, Colchester United and Canvey Island[37][38] Last updated: 13 January 2018.

Source: [citation needed] On 21 June 2017, the league fixtures were announced.

[39][40] On 16 October 2017, Gillingham were drawn at home against Dagenham & Redbridge or Leyton Orient in the first round.

[41] Another home fixture was confirmed for the second round with Carlisle United the visitors.