Loving God is a key theme in the Gita. In Chapter 9, Lord Krishna tells us that loving God is the Holy Secret and the key to attaining ultimate freedom from cycles of birth and death. He explains that God is everything and everywhere. He is the creator and more because the very notion of the world is His. Thus, even the worst sinners are liberated by the love of God.
In Chapter 12 of the Gita, Lord Krishna describes all the good things that happen to those who love Him. He tells us that those of us who do love God are dear to Him. But He does not talk about loving humanity to the extent that He speaks of the power of our loving Him. It is through our understanding and love of the divinity that we merge into the Lord and attain ultimate salvation.
See The Gita, A New Translation of Hindu Sacred Scripture by Irina Gajjar.