Striker Jo Kuffour had to be withdrawn after only 20 minutes against the Addicks with stud marks on his calf and the former Brentford man is also rated as doubtful.
Steve Elliott is struggling with illness and was sent home from training on Thursday while fellow central defender Danny Coles (knee) is also a doubt.
On-loan midfielder Wayne Brown is unavailable and is back at parent club Fulham receiving treatment on his ankle injury.
But defenders Aaron Lescott and Carl Regan are fully fit once again after recovering from a hip injury and a dead leg respectively.
Gillingham 7/5, Bristol Rov 19/10, Draw 12/5