I don't believe this.
Barcelona won't sign any players until the new president is elected, on July 18th. And I doubt very much that all the presidents would take in Pogba, as some consider him to be too expensive.
And buying Gerson to make the deal cheaper? What kind of stupidity is this? It would cost us just as much because, obviously, Gerson is not a free player. And if Juventus wanted him they could just buy him. So I don't understand why we would do that.