Paul is the apostle to the Gentiles (Rom. 11:13).
And the Gospel which Paul preached (1 Cor. 15:1-6) is NOT the same Gospel which the Lord Jesus Christ and His eleven apostles preached (Matt. 4:23 & 9:35) during His 3 and a half year ministry.
The Gospel of the Kingdom is what our Lord preached during His ministry.
The Gospel of the Death, Burial, and Resurrection (1 Cor. 15:1-6) does not show up until after Paul.
Paul also preached to the Jews, Acts 13:46; Acts 18:6 and Paul preached the same one gospel to the Gentiles that he did to the Jews. So 1 Cor 15:1-6 is the same thing Paul preached to both Jews and Gentiles.
Gal 2:2 "
And I went up (to Jerusalem) by revelation, and communicated unto them (Jews) that gospel which I preach among the Gentiles,"
Again, Gal 1:23 Paul preached the faith that he once destroyed, means he preached the same thing Peter and ohter apostles preached. In Acts 15, the apostles had a meeting in Jerusalem over circumcision, verses 1,2. During this meeting in which Paul was present Peter sid God put
NO DISTINCTION between Jew and Gentile, verse 9, so there would be no distinct different gospel
S between Jew and Gentile. Peter also said that both Jew and Gentile are saved in "like manner", verse 11, by that same one gospel both are saved. Paul never stood up and objected and say "
no Peter, I preach a different gospel than you and the Gentiles are saved differently than the Jews" Didn't happen.