Gent, who left in the summer of 2010 following Tommy Brookbanks to Hucknall Town, has most recently been playing under Brookbanks at ChromaSport & Trophies United Counties League side Quorn.
Gent left Carlton once before for a short spell with Blue Square Bet North side Harrogate Town before returning to Stoke Lane, and the lure of the Bill Stokeld Stadium has brought him back again.
He has scored some important goals in the past for Carlton, including the goal which secured promotion from the Baris Northern Counties East League and one of the goals in the play-off defeat against Stocksbridge Park Steels.
Going the other way are Adam Kimberley and Joe Naylor. Kimberley has joined a sizeable collection of ex-Millers at Rainworth Miners Welfare and Naylor has gone to AFC Mansfield, three steps down.