Gardner heads to Nottingham Forest on loan until end of the season
The announcement comes a year after the central midfielder embarked on his first loan spell at The City Ground.
He went on to make 18 appearances for the Reds.
He is yet to make a first team appearance this season in claret and blue.
But he will now be available to Dougie Freedman for the rest of the campaign.
In other transfer news, Joe Cole has joined Coventry City on a permanent deal and Tiago Ilori has returned to Liverpool.