Although Gradel has predominantly featured as a substitute, he has already scooped three man-of-the-match awards.
Leicester boss Nigel Pearson only loaned out Gradel in a bid to boost match fitness and insists his long-term future remains at The Walkers Stadium.
"He's not for sale, it's as simple as that," Pearson told the Yorkshire Evening Post. "Max is a player who has had limited opportunities here this season and that's why he is on loan. It gives him an opportunity to be playing games, which is important to us, while it's difficult for him to get in our side."