Gabriel won the Premier League title and Copa America this past season.
He was criticised for his performances in a limp World Cup for Brazil and then saw his opportunities at the Etihad limited by the terrific form of Sergio Aguero .
Having dealt with those challenges, the forward sees improvement in his game.
“I don't see this as a recovery," he told reporters. “I learned since the World Cup, I came mentally better, I worked a lot at City.
"In the beginning, it was a bit complicated but with the help of my family, friends and colleagues, I could focus again on my football."