The Gospel of God’s grace is all about God’s grace in salvation. It starts from election and ends with the glorification of all His chosen ones, to whom Christ has imputed His Righteousness and whom the Holy Spirit has made alive.
The Gospel is the Good News of the grace of God in doing everything to save His chosen people from their sins, therefore no one has any biblical right to keep any doctrine that teaches the grace of God in salvation out of the Gospel.https://www.godsonlygospel.com/the-doctrines-of-the-gospel-part-4