The former Liverpool man, who himself has been linked with a move to Old Trafford, believes the team spirit at the Red Devils will improve when their new manager arrives
Van Gaal led Oranje to the semi-finals of the World Cup before they were defeated by Argentina on penalties and was praised for his tactics throughout.
And Kuyt, who has been linked with a move to Old Trafford following some impressive showings in Brazil, feels that the team spirit that the veteran coach can create will have a big impact on the Red Devils.
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"He is desperate to be successful and I am sure he is going to be successful in his next job.
"The spirit is part of everyone. Of course the coach is leading us but team spirit is amazing.
"The 23 players were really important and almost everyone played except for Michel Vorm, and that says a lot about this team. We are not 11 players, we are 22 players and an enormous staff of 26 people and everyone played their part in this success."
Kuyt and Van Gaal must now concentrate on Saturday's third-place play-off against Brazil but the Fenerbahce man admits that it is hard to concentrate on the game in Brasilia so soon after missing out on a berth in the final.
"I am not thinking about the next game as I am so disappointed we didn't get to the final," he lamented. "I really believed in it and believed it was our tournament and we did well.
"We were so close to reaching the final and I had confidence we could beat Germany. Now we have to focus on another game. We did so well, we came so far that it would be a shame to go home with two losing games."