Celtic are looking to strengthen the right-back position after a number of departures at the end of last season.
The report, from journalist Stephen McGowan, states that the 21-year-old Polish youth international is 'expected to leave' his current club before the end of the transfer window.
With Southampton dropping out of the running after the closure of the English transfer window, one potential barrier to a Hoops deal is now not an issue.
McGowan also writes that the right-back is just one of four positions that manager Neil Lennon wants to strengthen this summer. It's said that the Celtic boss is also on the hunt for a left-back, a winger and a striker.
Polish outlet Gazeta Wyborcza claimed back in January that Celtic were keen on signing Gumny, however the Scottish champions did not firm up that reported interest with an official move.
The Scottish Daily Mail's reported £6m fee (13/08 print edition, back page) for the Polish prospect is steep when you consider that the Hoops look to have found a viable first-team right-back already in Hatem Abd Elhamed.
There were question marks about the Israeli international prior to his arrival but his first couple of appearances suggest he could be a solid option for Lennon this season.
However, Gumny's stock is on the rise having made 75 appearances for Poznan to date, as well as helping his country qualify for the recent European U21 Championships.
With another right-back for competition and back-up needed anyway, investing in his future now could well stave off interest from richer clubs in future transfer windows and secure a player with high potential.
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