Van Gaal, who currently manages the Netherlands national side, has been consistently linked with the job at Old Trafford since David Moyes was sacked in April after a disastrous reign.
Kluivert did not confirm that Van Gaal would definitely join United, but backed the 62-year-old's qualities that make big teams play better football and win games.
"I think he didn't sign yet so I can't say nothing about it... (but) I think he can let big teams play even better and win important prizes," Kluivert told ESPN.
"I think he's got a lot of qualities but the most important thing (is) he can make any team play better than they are. That's very important. He wins games.
"Louis is a great trainer. He proves with different types of teams that he can manage to be champion. He is sophisticated, absolutely. It's a pleasure to work with him."
It has been suggested that Kluivert will follow Van Gaal to Manchester United as part of the backroom staff, should the Dutchman join the club.