I don't know "What is GOD".

But I know that Anand is God and God is Anand. Anand means Krishna. Krishna is suprime god called as "परब्रह्म, ॐ, सत, चित, आनंद, सच्चिदानंद अक्षरारतीत परब्रह्म". You should understand that Krishna is starting of universe. He is creatures of universe, you and me.