The term "God Son" refers to the one who is a true, obedient and faithful son of God. He is one who is only interested in God as his subject matter and vomits all other things associated with it. Anything that says it belongs to God is surely something that God Son would get fascinated with. For him leaving God other things are of very less importance. He doesn't belong to any caste, creed or sect and takes all the things that comes in the name of God.
So in the name of God, let me start the quran. Since I write it on my style, there is definitely lots of mistakes in my writings but as I have said God is the only subject matter and my writings will also show the same. Let me start with the surah1(chapter 1) ayat1(verse 1)
Al-hum-du lil-laa-hi rab-bil al=aaa-meen
This is the first verse of the quran and a very great verse because they pay their interest for Allah(God). It is indeed a great thing because they feel God is more merciful, powerful, goes beyond everyone's imagination and is the lord of the universe.
Another most notable thing about the book is that, in the whole book no where anyone is referred as godson or daughter favoring his family lineage. They feel that God is so great and magnificent that he just can't have any son or daughter. He is one and only one and there is no for him. It is indeed a great thought.
In the bhagavath githa lord Krishna, as a message of God says the basic duties, virtues and values of a human. Similarly here it is imposed that each and every person should follow few values of humanity. It should be noted that this book considers only Allah(God) as his mentor and leaving him it doesn't give respect for others, no matter he might be a great emperor or great Saint or a follower of Islam.