“I am the father and mother of this universe, and its grandfather too; I am its entire support. I am the sum of all knowledge, the purifier, the syllable Om; I am the sacred scriptures, the Rik, Yajur, and Sama Vedas.”
-Bhagavad Gita 9:17
God is the universe’s “entire support.” Yes.
A bond between two things that creates something new, something bigger and better than the parts by themselves, is the basis of all chemistry, biology, psychology, sociology, and history. Such bonds are the universe’s “entire support.”
Now imagine that concept personified, endowed with an emergent consciousness, much like the consciousness that appears to emerge from the collections of cells we call humans. What do you call that concept, that consciousness.
I call it, him, her, (or whatever) God. Call it what you will. It just is.