The 23-year-old stated that he was glad that the loan move to Forest was sorted way early in the January transfer window instead of on deadline day.
So happy my loan got done before last day goodnight all training tomorrow #nffc— Gary Gardner (@22Gards) February 1, 2016
The former England Under-21 international enjoyed a successful loan spell at the City Ground in the second half of last season, and he will hope to have a similar time this campaign.
The midfielder has featured in three league games for Forest so far this season, creating two chances in the process.
Gardner has a pass accuracy of 85% and a shot accuracy of 50%, and has won six headers and two tackles.
Forest are 11th in the Championship table at the moment with 39 points from 29 matches.