This was more than a courtesy call, Paul’s visit to Jerusalem. He went to spend time with Peter, the lead apostle in the Jerusalem Church.
Had they met? Possible, but who knows. It was incumbent on Paul to make this visit and spend this time with Peter. Paul was the one who had violently persecuted Peter and his fellow believers. Paul was the one who, rumor had it, had met the risen Christ. In that encounter Christ had forgiven Paul and commissioned him to take up the special calling of apostle to the nations.
This gave Paul a status that was not found in and among the Jerusalem leaders. For this Paul needed time to explain and spell out. At the same time Peter could have filled in some blanks about the life, ministry, and teaching of the Lord Jesus Christ. Both Peter and Paul had some telling to do.
And that seems about the end of Paul’s ties to the Jerusalem church. They were the ones who held firm for maintaining Jerusalem and the Temple as the centers of the cult of Jesus Christ.
Paul could have nothing of that. All he had heard, thought, and learned raised higher and higher the vision of Stephen, the vision of the Gentile nations, the things Jewish and the exclusive hold on these––all these were reversed and dismissed. They had no place in the Gospel of Jesus Christ, Lord of Lords and to whom the Father gave the nations.
The reversal of his life and teaching that happened in the house of Judas on the street called Straight gave Paul a light and a heart for the Gospel of his Lord for the Jew first and for all the nations.