The U.S. is evaluating documents sent by Turkey to push for the extradition of Gulen, the alleged mastermind of the country's recent failed coup.
Christophe Naudin is accused of helping the pair flee the Dominican Republic.
The acclaimed film director is wanted in the United States for having sex with a minor.
The Wikileaks founder has been staying in the embassy since 2012.
The three whistleblowers were commemorated as part of a traveling project.
Sweden wants to question him on allegations of sexual assault and rape, which he denies.
Tommy Thompson raised over $40 million in gold from the SS Central America, which sank off the coast of South Carolina in 1857.
The announcement comes on the heels of the historic agreement normalizing ties between Washington and Havana.