The former Inter and Real Madrid man is the latest high-profile name to try his hand in France's top flight, with his move coming just days after Neymar sealed a €222million switch to PSG from Barcelona.
The group got on board a yacht called "Ginevra" around 8pm (1800 GMT).
"I'm a footballer who loves to play with the ball and with the team, and risk making some skillful moves", he is quoted as saying by Fox Sports.
His paperwork was filed in time for the Brazilian forward to make his debut in PSG's first game of the season - a 2-0 win over Amiens on Saturday night.
"He did not come around to see us at Camp Nou but his agents were on hand to facilitate his transfer hence there was little the players could do to convince him to stay".
The 23-year-old, scored one and made two assists against Chapecoense last night as they two sides played out a match in tribute to the tragic plane crash.
Speaking on the player's departure, coach Ernesto Valverde acknowledged the prospect of splashing the cash in the transfer window although he was also quick to say they will not be rushed into taking decisions over the player's replacement.
-Neymar is now a part of Barcelona's past, Barca President discloses.
L'Equipe reported that the Spanish FA (RFEF) have 15 days from August 3, when Neymar joined PSG, to send the documentation to Liga officials for forwarding to France. "I don't think they understood my style of play".
Neymar is considering a formal complaint to Federation Internationale de Football Association against his former club Barcelona over an unpaid loyalty bonus, according to Sky Sports.