Gabriel Jesus will be your false 9. Rest assured of it. He does it marvelously in Palmeiras. He is the striker and reference on speed plays, he attack by the wings when necessary and also comes back to cover for the left winger. By doing that he became the top scorer in the BR league (incidentally, he is tied with robinho, ex man city, with 10 goals), I think that is what Guardiola has seen and want from him.