Gospel does not mean God's spell.
Gospel means good news, as in the good news of Jesus Christ our Savior.
There is nothing "evil" about God's word. His word is His will, and God's will cannot be separated from what He is, which is Love, Agape love. The perfect love of God which casts out all fear.
If you want to do evil, you are moving away from God's word. Evil is completely against God.