The 22-year-old, who was signed from Gillingham last summer, has failed to hold down a regular first team place at The Den since arrving and his stay so far has been clouded by an impending court case.
And has Grant departs The Lions are set to sign winger Damien Scannell on loan on Monday and could join the club onn a full-time basis if he impresses Willie Donachie and his back room staff.