What did Paul communicate to the Jerusalem leaders when he went up?

Paul communicated the gospel he preached among the Gentiles to the Jerusalem leaders, going up by revelation to convince them that his gospel to the Gentiles was not connected with Judaism. He received this gospel from the Ascended Lord in glory, not from the twelve or Christ's earthly ministry.

Les explains that Paul went up to Jerusalem by revelation, meaning God instructed him to go and meet with the twelve. His purpose was to convince them that his gospel to the Gentiles was not connected with Judaism. He communicated unto them that gospel which he preached among the Gentiles. Everything Paul revealed to pass on to the Roman world was revealed from the Ascended Lord in glory—not from the twelve, not from the earthly ministry of Christ, but from the Ascended Lord. This same word is later used in 1 Corinthians 11:23.

Galatians 2:2

And I went up by revelation, and communicated unto them that gospel which I preach among the Gentiles, but privately to them which were of reputation, lest by any means I should run, or had run, in vain.

To whom did Paul communicate his gospel when he went to Jerusalem?

When Paul went up to Jerusalem by revelation, he communicated the gospel he preached among the Gentiles to Peter, the eleven apostles, and other leaders of the Jerusalem believers. This was a supernatural trip, and the gospel was an advance beyond what the Jews in Jerusalem knew.