The goal keeper says God's called him to ministry back in his homeland Brazil.
Unless he's persuaded to play for one more season, the 38 year old will lace his boots one last time for Saturday's FA Cup final at Wembley when his team take on Premier League champions Manchester City.
While he has played in every round of the competition he's not guaranteed to play in the match with Watford, who often favour their other goalkeeper Ben Foster, but Gomes will be a substitute at least.
Speaking to the Daily Mail, he said: "As a pastor, it is something more recent in my heart. I got a call from God and this is becoming more strong in my heart. God will tell me where I need to go and do it, probably in Brazil because I want to be home again, but I also want to be around the world doing it. I want to help people.
"When God puts something in your heart, like he has for me with this, it is because the time is coming. It is the right time for me to do this. Religion has always been important for me, in my heart, in my life, but it has never been on my mind like it is at the moment. I know this is what I want to do for the next bit."
Gomes plans to couple his ministry with a career as a football agent.
In an industry often criticised for greed and selfish ambition, Gomes says he will act in way which is "good in God's eyes"
Gomes has represented his country eleven times and also played for Tottenham Hotspur.
He says he expects to retire after his Wembley appearance but Watford are keen to renew his services for one more year.
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