The problem is that while it's true that "Gospel" has lost its original sense and, in fact, now has now meaning at all, writing "good news" in its place is a cure that's worse than the disease

Most people today think that "Gospel" designates a literary genre, the story of Jesus' life, and that Matthew, Mark, Luke, and John wrote Gospels the way that Racine wrote tragedies or Ronsard sonnets. But that meaning only established itself about the second century. The word that Mark wrote at the start of his narrative meant "good news." When Paul wrote to the Galatians and Corinthians thirty years earlier about "my Gospel," it meant: what I preached to you, my personal version of this good news. The problem is that while it's true that "Gospel" has lost its original sense and, in fact, now has now meaning at all, writing "good news" in its place is a cure that's worse than the disease: it has a "nice Catholic" ring to it, you instantly imagine the priest's syrupy smile and voice.

E. Carrere, The Kingdom (2014), tr. J, Lambert, 333