And Paul's grace gospel was that Gentiles by God's grace could become a part of the Father's firstborn son.
Colossians 1:13 He has delivered us from the power of darkness and conveyed us into the kingdom of the Son of His love, in whom we have redemption through His blood, the forgiveness of sins.
This is Paul's grace gospel preached to Gentiles.
No. Paul preached: Grace through faith alone in Christ.