No, rulz. Paul went to the Jew first and also to the Greek to gather the remnant according to the election of grace which God foreknew into the Body of Christ.
Romans 1:15-16 KJV So, as much as in me is, I am ready to preach the gospel to you that are at Rome also.16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
Romans 11:1-5 KJV I say then, Hath God cast away his people? God forbid. For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin. 2 God hath not cast away his people which he foreknew. Wot ye not what the scripture saith of Elias? how he maketh intercession to God against Israel saying, 3 Lord, they have killed thy prophets, and digged down thine altars; and I am left alone, and they seek my life. 4 But what saith the answer of God unto him? I have reserved to myself seven thousand men, who have not bowed the knee to the image of Baal. 5 Even so then at this present time also there is a remnant according to the election of grace.
His ministry had nothing to do with the ministry given the 12 apostles in Matthew, Mark, Luke and John. Please notice it was Paul's my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began, but now is made manifest,...
Romans 16:25-27 KJV Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began, 26 But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith: 27 To God only wise, be glory through Jesus Christ for ever. Amen.
In fact, not only did Paul's ministry have nothing to do with the 12's, he couldn't have even been forgiven under their good news at all because he blasphemed the Holy Ghost.
Matthew 12:31 KJV Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
Matthew 12:32 KJV And whosoever speaketh a word against the Son of man, it shall be forgiven him: but whosoever speaketh against the Holy Ghost, it shall not be forgiven him, neither in this world, neither in the world to come.
How then do you explain he preached the same gospel? And can you explain why Paul received mercy even though he was before a blasphemer?
And BTW, John 3:16 is not the gospel of Christ, the power of God unto salvation to every one that believeth...
Paul preached the same Gospel that he once persecuted other for.
Galatians 1:23
23 But they had heard only, That he which persecuted us in times past now preacheth the faith which once he destroyed.
Paul preached the same Gospel to the Jew first and then to the Greek.
Romans 1:16
16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
In Christ there is neither Jew nor Greek. If there are two gospels then you are saying the is a difference between Jew and Greek in Christ.
Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands; 12That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world: 13But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
Did you get all that? The gentile and the Jews have been made ONE in Christ. If there are two Gospels then they cannot be ONE in Christ.
14For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us;
What is this middle wall of partition?
15Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace;
Do you see that? ONE new man in Christ
16And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby:
Reconciled BOTH unto God in ONE body by the cross.
17And came and preached peace to you which were afar off, and to them that were nigh. 18For through him we both have access by one Spirit unto the Father. 19Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God; 20And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone
What is the foundation Paul tells us this Gospel is built upon? The foundation of the apostles, and prophets, Jesus Christ himself being the chief corner stone.
; 21In whom all the building fitly framed together groweth unto an holy temple in the Lord: 22In whom ye also are builded together for an habitation of God through the Spirit.
MAD simply builds up that which Christ tore down.
Peter at one time dissimulated and Paul called him on it. Why would Paul do this if they were not to preach the same Gospel.