The Brazilian right-back has been included in the Red Devils' touring party for a trip to the United States and is keen to see what new methods the Dutchman will bring to the club
Van Gaal was officially unveiled to the media as David Moyes's successor on Thursday before United flew out to the United States for their pre-season tour.
Rafael was a member of the 25-man squad who flew across the Atlantic, where the club will contest friendlies against LA Galaxy, Roma, Inter and Real Madrid.
He told MUTV: "I'm very excited, Everyone's excited to see how he'll be both during games and away from it.
"It's clear [from watching Van Gaal in charge of Netherlands at the World Cup] that he likes to play with intelligent players. These types of players can change games and often shift from one formation to another. He seems very good at [doing] that.
"Some of his staff have been here from quite early on so we have an idea of his methods but we are all looking forward to finding out more from him."