The Whites had a bid for the Scottish striker accepted on Tuesday, and the 24-year-old will travel to the club's Thorp Arch training ground for a medical and to discuss personal terms.
He could now be joined at the club by fellow Scotland international Rae. The 32-year-old midfielder is one the players City boss Dave Jones is looking to move on as he reshapes his squad. "Ross is going up to Leeds to have a talk with Leeds and I think Gavin Rae is as well," Jones said.
"I've said we need to move people out to bring people in and unfortunately they're the ones and maybe one or two more will go as well."
Grayson has also confirmed that no decision will be taken on trialist defender Calum Davenport this week, while he also revealed that Honduras international Ramon Nunez is still training with the club.