The former Queens Park Rangers target has been among the goals against this season.
Mark Warburton is looking to add a striker to Ibrox ranks. Gregory would be perfect for Rangers.
Millwall's Lee Gregory has allegedly handed in a transfer request at the Den.
Scottish Premiership club Celtic, Sheffield Wednesday and Queens Park Rangers are reportedly interested in signing Lee Gregory from Millwall in the summer transfer window.
Celtic, Sheffield Wednesday, Queens Park Rangers and Brighton & Hove Albion are reportedly interested in signing Lee Gregory from Millwall in the summer transfer window.
Sheffield Wednesday are reportedly keen on Millwall striker Lee Gregory.
Celtic and Derby County have reportedly been watching Halifax Town striker Lee Gregory, along with the likes of Serie A duo Chievo and Catania.