'Gospel of God' in the Bible

Paul, a servant of Jesus Christ, called to be an apostle, separated to the gospel of God,

That I should be the minister of Jesus Christ to the Gentiles, ministering the gospel of God, that the offering up of the Gentiles might be acceptable, being sanctified by the Holy Spirit.

Have I committed an offense in abasing myself that ye might be exalted, because I have preached to you the gospel of God without reward?

But even after we had suffered before, and were shamefully treated, as ye know, at Phillippi, we were bold in our God to speak to you the gospel of God with much contention.

So being affectionately desirous of you, we were willing to have imparted to you, not the gospel of God only, but also our own souls, because ye were dear to us.

For ye remember, brethren, our labor and toil: for laboring night and day, because we would not be chargeable to any of you, we preached to you the gospel of God.

For the time is come that judgment must begin at the house of God: and if it first beginneth at us, what will be the end of them that obey not the gospel of God?