A visitor writes,
"What is the gospel for the Gentiles?"
The Gospel for the gentiles is the same as that for the Jews. It is that God will soon fill the earth with His glory - see Numbers 14:21 it revolves around the promises given in Eden, to Abraham, and to David. Genesis 3:15; 22:18; Psalm 89:34-37; 33:5; Hosea 13:14; Isa. 25:7-9; 51:1-8; Jeremiah 23:5.
The only way to obtain salvation is to believe the Gospel the preached by the Lord Jesus and the apostles, and to take on the name of Christ, by being baptized by total immersion in water, and continuing patiently in the observance of all things he has commanded, none being recognized as his friends except those who do what he has commanded.
Acts 13:48; 16:31; Mark 16:16; Romans 1:16; Acts 2:38, 41; 10:47-48; 8:12; Galatians 3:27-29; Romans 6:3-5; 2:7; Matthew 28:20; John 15:14.
A brief definition of the Gospel is provided in the book of Acts. It consists of "The things concerning the Kingdom of God and the Name of Jesus Christ." Acts 8:12; 19:8,10,20; 28:30-31.
I hope that answers your question.