Gattuso was speaking after the Coppa Italia win over Sampdoria.
He said, “We have a very honest relationship, we say things to people's faces. There is great honesty. When a player makes certain choices, it becomes difficult to convince him otherwise. One can try.
“At this moment, he is a Milan player and we're holding on tight. I don't know what will happen. We are honest with each other and I want him to maintain this attitude, which has never been lacking thus far."
Gattuso continued: “I've talked to him a great deal, but it's hard to give advice, because the career of a player only lasts 13-14 years. It's his mind, not mine. The most important thing is to talk as men, look each other in the eyes and speak the truth.
“I haven't figured out what Higuain is unhappy with, because I see him look content and involved in the locker room atmosphere. We'll see what happens. If it was up to me, I'd keep him at my house and feed him my dinner."