But it seems that there was a gospel message to the Jews and a gospel message to the gentiles.
When Jesus was here, you had The KOG on Earth, come down, so, you had the "gospel of the Kingdom"
So, it was to the Jews that this particular gospel applies.
John the Baptist explains this as "repent, as the KOG is at hand".....and It was, as Jesus was here on Earth.
= THis is not the Gospel of The Cross of Christ whereby any Jew or Gentile believer can be forgiven and born again., based on "Justification by FAITH".... as THAT Gospel is "in the time of the Gentiles"... that began with the Cross and will end when the Trib Starts.....
Some would teach this as the "church age" or the "age of Grace'.. if you are doing a study on the "times and seasons" found in the word of God.
The Trib is God resuming His dealing with Israel and its also the time when the world is Judged......so, this gospel reflects the coming of the KING........which is the same as When Jesus was here.
Its for the Jew.
Paul's Gospel is "everyone come to The Cross and find eternal forgiveness, imputed righteousness, and eternal salvation"
Paul's gospel is a universal OFFER to any Jew or Gentile who will come and believe.. while they are alive, ...regarding what Jesus has provided on The Cross, which is the blood atonement.