Gavin said he had 'no regrets', after stepping away from the role, which saw him help guide Dublin to six All-Ireland wins, including a first ever five-in-a-row; Seven Leinster titles, and five Allianz Football League Division 1 titles, including a four-in-a-row.
Dessie Farrell, who won the 1995 All-Ireland with the Dubs against Tyrone was confirmed as the Clondalkin man's replacement yesterday evening.
"I gave it my all for as long as I could, and I'm just really excited now for 2020, excited for the team and to see what will happen with them," said Gavin.
It was believed he would stay on for 2020, but Gavin said it was important to consider everyone concerned, before making the decision to step away.
"I suppose the conclusion that I came up with at the end was that what was best to allow the team to be in the best space to grow again was for me to simply hand the reins on."
Along with an seven-year stint as Dublin Senior Football Manager, Gavin was also previously involved with the Under 21's, and says he hugely enjoyed his time in the Bainsteoir bib.
"I've been involved for twelve years as a manager of Dublin football teams. It's been a massive part of my life, I've loved every moment of it," he said. "I had a great journey, great times, worked with a phenomenal and exceptional group of players.
"I've gotten very busy professionally in aviation, I love what I do in that.
"I volunteered my time, I put my name forward, I was selected many years ago by the panel, and I'm really proud of being involved with it.
"I won't have any regrets, that is for sure. I gave it my all for as long as I could. I'm just really excited for 2020 and excited for the team and to see what will happen with them."