Two 60-minute training matches were played at Southampton's training ground on Monday as the Gills stepped up their preparations ahead of the new season.
The first game finished 1-0 to the hosts, with the second being a 3-1 win for the Saints.
It was the first time that Gills had worn their black away strip with the first half team containing players such as Seb Palmer-Houlden, Armani Little, Joe Gbode and Jonny Williams. Josh Andrews, Bradley Dack and Harry Webster were among those who featured in the second half.
The team are back in action this Saturday when Luton visit ME7.
