Exactly! The same one and only gospel to the Jews as to the Gentiles.
You apparently don't understand the law of non-contradiction.
The "gospel of the circumcision" cannot be the "gospel of the uncircumcision" because the two are complete opposites of the other.
Paul wasn't sent to the Gentiles because he had another gospel different than the gospel of Peter and the other apostles!
Yes he was.
But on the contrary, when they saw that the gospel for the uncircumcised had been committed to me, as the gospel for the circumcised was to Peter(for He who worked effectively in Peter for the apostleship to the circumcised also worked effectively in me toward the Gentiles),and when James, Cephas, and John, who seemed to be pillars, perceived the grace that had been given to me, they gave me and Barnabas the right hand of fellowship, that we should go to the Gentiles and they to the circumcised. - Galatians 2:7-9 http://www.biblegateway.com/passage/?search=Galatians2:7-9&version=NKJV
Paul was sent to the Gentiles because the Jews did not trust him.
That's part of the reason God sent him to the Gentiles, but it had nothing to do with Peter, James, and John or the rest of the Twelve.