Who did Paul communicate his gospel to, and where had he preached it?

Les teaches that Paul is defending the origin and scope of his apostleship. Paul certifies that the gospel preached by him did not originate with man; he neither received it from man nor was taught it, but received it by the revelation of Jesus Christ. When that revelation came, Paul did not immediately confer with flesh and blood—meaning the twelve—nor go up to Jerusalem to those who were before him, but went into Arabia, which Les identifies with Sinai. Les points out that God revealed the doctrines of grace at the same mountain where He revealed the law to Moses. Fourteen years later, Paul went up again to Jerusalem with Barnabas and Titus, led by revelation, and communicated with absolute clarity that gospel which he preached among the Gentiles. Les emphasizes the stipulation: Paul's gospel among the Gentiles was totally different from what Peter and the eleven preached to the Jew. It is the same God, but God is now dealing not only with Israel under law and the kingdom economy, but with the Gentile world as well as the Jew, with the gospel of the grace of God—God in His own person taking on human flesh, going to the Roman cross, shedding His blood, and being raised from the dead to save lost humanity.