Gospel \GOS-puhl\ , noun;
1. The story of Christ's life and teachings, especially as contained in the first four books of the new testament, namely Matthew, Mark, Luke, and John
2. Any of these four books
3. Something regarded as true and implicitly believed
4. Gospel music
1. Of, pertaining to, or proclaiming the gospel or its teachings
2. Of or pertaining to gospel music
3. In accordance with the gospel
The origin of gospel is Old English godspel ("gospel, glad tidings announced by Jesus; one of the four gospels"), which is a combination of god + spel ("good" + "story, message"). The Old English word came as a translation of Latin bona adnuntiatio, which was translated from Greek euangelion ("reward for bringing good news").
Old English god meaning "good" and god meaning "God" are actually unrelated, despite outward appearances. God ("good") had a long 'o' and derives from Proto-Germanic *gothaz from Proto-Indo-European *ghedh- ("to unite, be associated, suitable"). God ("God") probably sounded like the modern pronunciation and it derives from Proto-Germanic *guthan from Proto-Indo-European *ghut- ("that which is invoked") from either *gheu(e) ("to call, invoke") or *ghu-to- ("poured").