Benson, 33, was stretchered off during the weekend's 2-0 defeat to Plymouth after sustaining an ankle injury and scan results have since revealed he will miss the next couple of weeks.
Shaun Harrad came on in place of Benson on Saturday and he will battle it out with Darryl Duffy in a bid to partner Byron Harrison up front.
Otherwise, Yates has no new injury or suspension concerns as he looks to bounce back from Saturday's defeat with a positive result against the Gills.
Defender Harry Hooman remains unavailable with the foot injury he picked up at the beginning of the campaign.
- Sports & Recreation
- Shaun Harrad
- Darryl Duffy