There is only One Gospel and it's revealing began in Genesis
Genesis 3:15
So the Lord God said to the serpent:
And I will put enmity
Between you and the woman,
And between your seed and her Seed;
He shall bruise your head,
And you shall bruise His heel.”
Genesis 22:2
Then God said, “Take now your son,
your only son Isaac,
whom you love, and go to the land of Moriah, and
offer him there as a burnt offering on one of the mountains of which I shall tell you.”
Then the Angel of the Lord called to Abraham a second time out of heaven, and said: “By Myself I have sworn, says the Lord, because you have done this thing, and
have not withheld your son, your only son
In your seed all the nations of the earth shall be blessed, because you have obeyed My voice.”
Galatians 3:8-9
And
the Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel to Abraham beforehand, saying, “In you all the nations shall be blessed.” So then those who are of faith are blessed with believing Abraham.