Van Gaal was officially announced as the next boss at Old Trafford last week, and the Netherlands coach will fly into Manchester when his World Cup duties with Oranje are over.
Giggs has ended his 24-year playing career to take up the role of assistant manager to the Dutchman, having cut his teeth in the managerial hotseat for the final four games of last season.
Speaking to the BBC, former goalkeeper Van der Sar thinks that the Welshman is ideally placed to further his coaching development under a boss who has won titles with the likes of Ajax, Barcelona and Bayern Munich.
"I'm sure under the guidance of Louis, [Ryan] can become an even better coach or manager in the future," he said.
"Even when I played with him he was busy with his coaching badges and the philosophy of the club is in the right hands with him."
"Ryan is going to be there as assistant manager and that should be enough, with his experience, to bring United in a better frame than this year."
Van der Sar, who won the Champions League under Van Gaal at Ajax back in 1995, talked up the "pedigree" of his former boss, and believes he is the best man for the Old Trafford restoration job.
He added: "He's won trophies in Spain and he did an excellent job in Germany with Bayern Munich, that's also not an easy club to go to with all the powerful people that are there in the stands."
United endured a miserable campaign last term, finishing in their lowest-ever Premier League position of seventh after 12 defeats.
David Moyes' wretched reign was brought to an end last month, before Giggs took over as interim boss.