Gillett is currently mulling over a permanent switch to Doncaster following the end of his loan spell.
Another midfielder, Martin Woods, returned to full training this week after a groin problem.
Woods last appeared in the home win over Sheffield Wednesday in early December and has missed the last three matches.
Defender Adam Lockwood has still not completely recovered from a foot injury that has kept him out for three months, while young striker Waide Fairhurst is nursing damaged ankle ligaments. Long-term absentee Steve Brooker (Achilles) is edging his way back to full fitness.