The Gospel is both what Scripture states it is, such as in Titus 3:5, and it is what many people rebel against unto their damnation. Godless arguments are simple to spot as soon as they are posted or spoken.
Any Child of God knows Repentance is far from a one time event. It actually is part of ongoing Sanctification, clearly described by all NT Writers. Deluded and confused Seekers look for a one time event unto "Holiness" in the flesh, such as within Pentecostalism. Such a pity.
Blessings unto your search for Truth. Be diligent and ready to hear.