The GOSPEL according to LUKE, what it means?

The Gospel according to Luke presents JESUS as both the promised Saviour of Israel and as the Saviour of all mankind.
Luke records that JESUS was called by the Spirit of the Lord to "preach the Good News to the poor," and this Gospel is filled with a concern for people with all kinds of spiritual need.
True joy is a quality of the heart and can affect the whole body for good. This emotion of joy, excited by the acquisition or expectation of good, or a state of happiness or, and exultation, is prominent in the Gospel according to Luke, especially in the opening chapters that announce the coming of JESUS, and again at the conclusion, when JESUS ascend to heaven.
Luke emphasizes in the Gospel that the true joy comes through the Good News to all who wants to enjoy salvation. His teachings to the believers were to enjoy the meaning of the seasonal festivals that God arranged for them, to rejoice their life in the true worship for God. They were to speak out about God joyfully. If they did not serve with joy of heart, then, something was wrong with their hearts and the appreciation of God's loving-kindness and goodness was replaced by the love of material things that were short-lived.
The Good News that Luke proclaimed was announced by God's angel as "good news of a great joy that all the people will have." (Luke 2:10).
JESUS spoke of some who would hear the truth and receive it with joy, but without getting the real sense of it. Such false joy do let that the implanted WORD in their hearts grow, and as a consequence soon lose that sentiment when they are being stumbled when tribulation or persecution comes from, for reason of the WORD. Wickedness, sickness and death will prevent those individuals from full and undiminished joy. When true joy exists, then, sorrow is removed and the true heart is filled with hope.
The story of growth and spread of the Christian faith after the ascension of JESUS is also told by Luke in the Book of Acts.
The Gospel of Luke contains so much material that is only found in this account. The Book tells us the events of JESUS' early ministry. It presents an accurate record in logical order, verifying the certainty of it (what Theophilus had been taught orally). (Luke 1: 3,4). The account has unique stories such as the  one about the song of the angels,  another mentioned the shepherd's visit at the birth of JESUS, the account about JESUS in the temple as a boy, and the parables of the Good Samaritan and the Lost Son.
Great emphasis is placed on prayer, the Holy Spirit, the role of women in the ministry of JESUS, and God's forgiveness of sins, throughout the Gospel.