Gospel was adopted as a technical term for the Christian message which is succinctly stated by Paul in 1 Cor 15:1-4 (notes 1Co 15:1; 15:2; 15:3; 15:4) and finds complete expression in the four Gospels and the epistle to the Romans. Succinctly stated, the Gospel is not just "getting saved" as so many believe, but it is "progressing in salvation" (growth in Christ-likeness).
The writers of the New Testament adapted the term Gospel as God's glorious message of salvation for lost otherwise hopeless, helpless sinners. Euaggelion is found in several combination phrases, each describing the gospel like a multifaceted jewel in various terms from a different viewpoint (from the NASB, 1977):
Pastor Timothy J. Atkins
Husband, Father, Grandfather, Pastor, Teacher, Discipler, and Follower of Jesus.