The Gospel is the story describing how God is at work to reconcile all things to Himself through the life, death, resurrection and future return of Jesus Christ.
But story doesn't mean fairy tale. The gospel is real, it's the supreme history of the world that ties all the other smaller stories together. The gospel is the historical narrative about the work of the triune God to unite all things together in the Son according to the eternal plan and will of the Father by the power of the Spirit.
From the very beginning God was orchestrating His great gospel rescue mission to reconcile and redeem a broken creation and fallen humanity from Satan, sin and its fallout. And that rescue is centered on the life, substitutinoary death and glorious resurrection of the Son of God, Jesus Christ. The gospel is God's saving activity, his work of reclaiming a people for himself, that we would glorify God and find all-satisfying joy in Jesus.
The gospel is the good news that God extends grace to broken people. While all people have rebelled against God's rightful rule as their Creator, in mercy He sent Jesus to redeem rebels and transform them into worshippers. The gospel is God's great announcement that He saves all who repent and believe in Jesus.
For more details about this amazing story, just click the image below: