from my school's tradition of Yogic theism I can say what god is in a sentence,
God is defined as the 'supreme personality of godhead'.
re-stated
The 'supreme personality of godhead' is unlimitedly "Full" in these specific 'six opulences', the 'six opulences' that define Godhead are,
All strength (all power),
All wealth (all glories),
All beauty (esthetic of perfection),
All Famous (known through the ages),
All Intelligence (consciousness),
All renunciation (un-bound to bondage of 'maya-shakti')
PS: we souls in the material world of 'maya-shakti' are tiny sparks of the "Supreme-Soul" (Oops, that is another description of God, in two words).
We souls inherit small degrees of the same 6 opulences, but only Godhead, has them "in-full".
So the soul can never become Godhead, but many souls have tried to imitate the status of a God.
Btw, the six opulences are specific to God. but inaddition, there are the six-feminine opulences mentioned in the Gita 10.43
While I mention it, there are many verses in the Gita that describe the natural characteristics of workers, and personality types. But in the Gita God is speaking directly to a prince.