2023–24 Gillingham F.C. season

The 2023–24 season is the 131st season in the history of Gillingham and their second consecutive season in League Two. The club are participating in League Two, the FA Cup, the EFL Cup, and the 2023–24 EFL Trophy.

Pre-season and friendlies
On 16 May, The Gills announced their first pre-season friendly, where an XI would travel to Tonbridge Angels. A day later, a second fixture was confirmed, against Dover Athletic. A third fixture was added in June, against Dartford. On June 5, a further fixture was announced, against Dagenham & Redbridge. A day later, a visit from Charlton Athletic was also added to the schedule. A seventh friendly, against Millwall was later announced. On 30 June, the club announced their full schedule, which included one final friendly which was a behind closed doors game against Cambridge United on 25 July.

Also confirmed by the club was a pre-season tour to Como in Italy for a five-day warm weather training camp.

Matches
On 22 June, the EFL League Two fixtures were released.

FA Cup
The Gills were drawn away to Hereford in the first round, at home to either Charlton Athletic or Cray Valley Paper Mills in the second round, and at home to Sheffield United in the third round.

EFL Cup
Gillingham were drawn at home to Southampton in the first round, and away to Luton Town in the second round.

EFL Trophy
In the group stage, Gillingham were drawn into Southern Group E along with Leyton Orient, Portsmouth and Fulham U21.