The gates of heaven are called "pearly gates" because of the description found in Revelation 21:21 - The twelve gates were twelve pearls: each individual gate was of one pearl. And the street of the...
No it is a term coined up whenever by whoever because the "Gates of Heaven are made of finst materials" eg Pearls. Or other option is it was the name of a comic book about heaven and saints.Another...
When Our Lord told Peter, "I will give to thee the keys of the kingdom of Heaven. Whatever you bind on earth shall be bound also in Heaven. Whatever you loose on earth shall also be loosed in Heaven."