Gregory Boyd observes that much of what we call Christianity is a diluted version of the knowledge of good and evil.
Moralism is not what Jesus has given us.
Some versions of the gospel come close to being explicit Christian versions of the knowledge of good and evil.
The cross replaced the tree of the knowledge of good and evil with the tree of life.
There are non-gospels, half gospels and pseudo-gospels that emphasise the law but are without substance.
This places this kinds of gospels in that box of theology that is no gospel at all.