The pair had to be withdrawn in the 2-1 midweek win over Crystal Palace with hamstring issues with head coach Sean O'Driscoll attributing the youngsters' problems to their age and lack of regular competitive football.
It means the likes of Marlon Pack, Liam Fontaine and James Wilson could all come into contention as City look for their second victory over the Gills this season.
Sam Baldock and Jay Emmanuel-Thomas look set to continue their partnership upfront but O'Driscoll has to decide whether to stick with goalkeeper Elliot Parish or recall Frank Fielding.
- Sports & Recreation
- Liam Fontaine