If you read it yourself you'll find it was quite a few places.
Read the book....
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Mark, who wrote the Gospel of Mark, was a disciple of Peter, who was a disciple of Jesus.
Because Mark's gospel is the word of God which is truth and his gospel states: Mark 1.1. The beginning of the gospel of Jesus Christ, the Son of God;
He went as far as Galilee to spread the Gospel. He did this with his disciples.
A Gentile was the first to acknowledge that Jesus is the Son of God
The word gospel means "good news" which is the story of Jesus. The gospel is the story of the death, burial, and resurrection of Jesus Christ. There can't be a gospel that does not have the story of Jesus in it unless in is an incorrect gospel. All of the gospel books in the KJV Bible - Matthew, Mark, Luke, and John - have the story of Jesus in them.
When Jesus left the world and left Peter to lead the church. It says it somewhere in a gospel but I cant remember right now.
biblegateway.com
The Aquarian Gospel of Jesus the Christ was created in 1908.
Mary Magdalene preached the gospel of Jesus.
The Gospel According to Jesus Christ was created in 1991.