Gattuso was sacked as coach of the Serie B club last month.
"He called me once in the middle of the night," Gattuso told French site So Foot.
"You can always call me, 24 hours a day, but the problem is that he knows nothing about football. He doesn't understand it at all and he's a hypocrite too."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball