When did God plan the gospel of salvation?
God planned the gospel of salvation before anything was ever created. This was all pre-planned so that God would create man, man would sin, and man would need a Savior and Redeemer. The gospel was therefore not an afterthought but part of God's eternal purpose set in motion before creation.
Les teaches that this was all pre-planned before anything was ever created, that God would create man, and man would sin and find himself in need of a Savior, of a Redeemer. God set everything in motion and brought about Christ in His earthly ministry, His crucifixion, and His resurrection, and brought Him back into heaven. From there He revealed these things that Paul calls the Secrets, or the Mysteries, and the very core of that is the Gospel, that Christ died for our sins.