Press Association Sport understands United are surprised by the reports and are insisting no such meeting took place.
It was suggested Van Gaal could take over from David Moyes, who has endured a difficult first season at Old Trafford, in the summer.
Van Gaal, 62, will become a free agent after Holland's World Cup campaign ends and he has already been heavily linked with Tim Sherwood's job at Tottenham.
Moyes was given a six-year contract when he took over from Sir Alex Ferguson last year but has faced criticism over the team's disappointing results.
Last season's champions have long been out of contention for the Premier League title and are currently seventh in the table.
Their prospects of qualifying for the Champions League next season are slim and the Van Gaal speculation comes just days after they were knocked out of this season's competition by Bayern.
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- Van Gaal
- Bayern Munich
- David Moyes