You're very short-sighted. The gospel of Jesus Christ ALREADY WAS in existence before the written Word, because it was given to Adam and Eve in the garden of Eden, and passed down to all, so that Nimrod (and satan) would have known it clearly. So satan, to deceive future generations, created his couterfeit from the already-existing gospel. Looks like he's still at work, and still succeeding in deceiving.
If not, might I ask where you got that bit from? It isn't anything that I have ever heard in any church I have ever attended.And yes, I went to Sunday school and have been confirmed and attend church.