'Gospel' in the Bible

Jesus answering said, Verily I say to you, There is no one who has left house, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my sake and for the sake of the gospel,

and the gospel must first be preached to all the nations.

But if also our gospel is veiled, it is veiled in those that are lost;

I wonder that ye thus quickly change, from him that called you in Christ's grace, to a different gospel,

because of your fellowship with the gospel, from the first day until now;

And know also ye, O Philippians, that in the beginning of the gospel, when I came out of Macedonia, no assembly communicated anything to me in the way of giving and receiving save ye alone;