At the end, did Naruto skip Chunnin and Jounin rank before becoming Hokage?
In regards to Naruto's rank which remains as the lowest one, Genin, due to Naruto spending most of his Part II's time fighting and training, Kishimoto decided Naruto would skip the following ranks to become the Hokage, which he felt was appealing.


Taken from Wikipedia, which references  Cinema Today: "Boruto: Naruto the Movie" (in Japanese).