Gospel is derived from the Old English gōdspel, which means good news. The New Testament Greek word is euaggelion (from which we get the word evangelist, or messenger of good news). Romans 1:16; Acts 21:8

Sin creates a separation between God and people, and there is nothing we can do to fix it. The good news is that God has provided the solution through his sacrifice. Jesus died to provide salvation and was raised from the dead to provide assurance and hope. 1 Corinthians 15:1-8

The first four books of the New Testament are sometimes categorized as the “Gospels”, because they contain the narrative of Jesus’ work. The entire New Testament is the complete gospel, because it contains all the information necessary to receive salvation through Jesus.

God’s gift of salvation and instructions on how to receive it are good news indeed. Acts 8:35-39

I am eager to preach the gospel to you also who are in Rome. For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek. For in it the righteousness of God is revealed from faith to faith, as it is written, “The righteous shall live by faith.” Romans 1:15-17

~ SR

Ruhmann, Scott. “Word of the Week: Gospel.” 27th Street Church of Christ. Access date: . http://www.churchofbend.com/wow/gospel.htm