Boro linked with French free agent
Boro have been linked with a move for the former Blackpool striker.
It has been reported that several Championship sides are monitoring his progress, with the likes of Derby County and Sheffield Wednesday joining Boro in the race to sign the forward.
Gnanduillet had been linked with a move to Boro in the summer transfer window, before the player opted for a move to Turkey.
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The 6ft 3in striker made 36 appearances for Blackpool last season, scoring 18 times.