Footnote 3

…Paul identifies himself as one separated as an apostle and called by God to preach the gospel. I said that the phrase “the gospel of God” did not mean the gospel about God but, rather, the gospel that is the possession of God. God owns that gospel. He is the One who invented the gospel and commissioned Paul to teach it. The gospel did not originate with Paul; it originated with God. Here, Paul uses the same structure to refer not to the gospel of God but to the gospel of God’s Son, Jesus Christ. The gospel is the possession of Jesus, but, even more, Jesus is the heart of the content of the gospel. We use it so glibly in the church today. Preachers say they preach the gospel, but if we listen to them preach Sunday after Sunday, we hear very little gospel in what they are preaching. Romans: An Expositional Commentary. by R.C. Sproul.