After City recorded a twelfth successive Premier League win with a 1-0 victory over Chelsea, the newly-crowned champions moved seven points clear of Arsenal.
It is Grealish’s second title in two seasons and he also says he is feeling back to his very best after a tough first campaign.
“We’ve got so much talent in the squad,” said Grealish.
“We feel unstoppable really at the moment. I feel so much more confident, fitter and back to what I know I can do.
“This is why Man City brought me here. I have a lot more to offer. I’m over the moon. It doesn’t stop here, we still have massive games coming up.
“It’s different. I feel this year I played much more of a part. I feel confident, back to my normal self.
“This year, I feel like I played much more of a part, it’s nice man!”
On hunting down Arsenal’s sizeable lead after a mammoth effort, particularly after the World Cup break, Grealish added: “We have felt invincible. Imagine if someone said you have to win 12 games in a row to win the league?
“I can’t put my finger on one thing (that was the turning point), but especially since the last international break we feel unstoppable.
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“Since then we’ve been unbelievable, especially April, I think it was the best month the club has ever had. I’m over the moon, buzzing.
“This year (has been better for me). I feel like I played so much more of a part. I feel back to myself.”
On his understanding and friendship with Erling Haaland, Jack said: “We have a great relationship. We come into training a lot together, we live in the same building.
“I’ve assisted him a few times. When you have a relationship off the pitch it makes it that much easier.”
And of City’s most successful manager of all-time, the England star was effusive of his praise for Pep Guardiola.
“I can’t speak highly enough of him,” he said.
“He knows everything. He comes out with different tactics. It’s a pleasure to work with. I love him!”
