As for the "gospel" and your erroneous comment that there was no gospel before there were catholics (I noticed you slipped in the lower case "c"), I wonder how it was that Abraham and other Old Testament saints were saved without believing the gospel? Are you familiar with the prophet Isaiah? See if you can identify the "gospel" (the good news) in this verse:
But...just in case you are making the same mistake I see many RCs make over the word "gospel" insisting the word only means the story of Jesus Christ and His teachings as written in Matthew, Mark, Luke and John, even that is NOT something Roman Catholics today can claim is all theirs. God used "holy men" who were carried along by the Holy Spirit to write the inspired words they did and man can lay NO claim or credit for that. It is ALL a gift from God. RCs claiming credit for the gospel are like the rooster thinking his crowing was what caused the sun to rise.
I'll try to make this as simple as possible. You and I both believe that life begins at conception....after you were born, your parents, maybe 2 or 3 days later said to their friends, come over and see little Boatbums...we gave her that name!!!!and from then on you were known as Boatbums.
However, you were really Boatbums from the very moment of your conception, 9months and 3 days earlier....same baby, new name.
The Catholic Church was concieved when Christ named Peter to be its leader....something had to exist from that moment on that required a leader. Soon after its conception and birth, people began to refer to it(Peter's group) as Catholic, but they had been Catholic from the moment of conception......you=Boatbums....they=Catholic!!!.....see how easy that was???