The word gospel comes from a Greek word which means good news. It was originally the announcement carried by a runner from a battlefield to a camp with news of a battle victory.
Gospel is a word of Anglo-Saxon origin, and meaning Gods spell, i.e., word of God, or rather, according to others, good spell, i.e., good news. It is the rendering of the Greek evangelion, i.e., good message. It denotes (1) the welcome intelligence of salvation to man as preached by our Lord and his followers. (2) It was afterwards transitively applied to each of the four histories of our Lord’s life, published by those who are therefore called ‘Evangelists’, writers of the history of the gospel (the evangelion). (3) The term is often used to express collectively the gospel doctrines; and ‘preaching the gospel’ is often used to include not only the proclaiming of the good tidings, but the teaching men how to avail themselves of the offer of salvation, the declaring of all the truths, precepts, promises, and threatenings of Christianity.” It is termed “the gospel of the grace of God” (Acts 20:24), “the gospel of the kingdom” (Matt. 4:23), “the gospel of Christ” (Rom. 1:16), “the gospel of peace (Eph. 6:15), “the glorious gospel,” “the everlasting gospel,” “the gospel of salvation” (Eph. 1:13).
Easton’s Bible Dictionary: Gospel