The former Wales international has been in contact with van Gaal during the World Cup and is happy with United's preparations for the new season, which kicks off at home to Swansea City on August 16th.
He added: "We spoke a few times and exchanged emails. It's been hard but we have been in contact.
"The preparations have gone well. He will be joining us next week and he will get to meet the players.
"Everything has been planned through Louis, Albert [Stuivenberg] and Marcel [Bout]. The blueprint has been prepared by Louis and we have been following his plans.
"It is not ideal but it can be like this in a World Cup year."