Nader, who acted as a link between President Donald Trump's team and Middle East and Russia officials in 2016 and 2017, faces a mandatory minimum sentence of 15 years in prison and a maximum of 40 years if convicted.
Rick Gerson befriended Jared Kushner more than 10 years ago and is the founder, chairman and chief investment officer of Falcon Edge Capital, LP.
Middle East lobbyist George Nader is now assisting the Mueller inquiry.
Robert Mueller's investigators asked witnesses for information on the meeting, which took place in early 2017 in New York.
Mueller is reportedly investigating a firm linked to George Nader, an adviser to the United Arab Emirates who frequently met with Jared Kushner.
Qatari officials reportedly decided against sharing the details with Mueller to avoid damaging relations with the Trump administration.
George Nader spent decades in Middle East policy circles. He disappeared for years before reportedly resurfacing in the Trump White House.