Gillingham will play Portsmouth at Fratton Park in an EFL Trophy group stage fixture on Tuesday October 10 (745).
Neil Harris will take his Gillingham side to Fratton Park on Tuesday October 10 for an EFL Trophy group stage fixture against Portsmouth.
Kick-Off is set for 7.45pm.
Gills have been placed in group E of the southern section alongside Leyton Orient, Pompey and Fulham U21s.
Portsmouth are now under the management of former Priestfield loanee, John Mousinho, and finished eighth in League 1 last season.
Leyton Orient will visit ME7 on Tuesday September 5 (7pm).
Ticketing details will follow in due course.