Earth qualifies as a god. God in this sense will be defined as a creator and provider. The following points provide the justification:
Earth made us. (Other entities, of course were involved, but Earth is definitely one of the major players).
Earth gives us food to eat.
Earth gives us water to drink.
Earth gives us air to breathe.
Earth supports us.
Earth is thus very much like a loving parent that engages in unconditional love, and since Earth is filled with all manner of life from way inside to the outer reaches of the atmosphere, Earth in this sense then is a living, loving entity.
Here is the speculative part:
Since Earth is alive as I have defined, It well could have developed it's own sentience. Just as a person becomes self aware at an early age, Earth could have done a similar thing. This self awareness would be made up of the living parts of Earth just as a person's self awareness is made up of their parts. It is some kind of natural process whereby when a system becomes complex enough, it becomes aware of itself. This study of this kind of process is on the forefront of modern science and has not been elucidated to the point of theory. Some people speculate that the internet or even self-evolving computer algorithms may develop self-awareness in a similar fashion. One of the earliest popular culture explorations of this idea is the sinister "Colossus: The Forbin Project". A movie made in 1970.
Given that this is the case for Earth, it seems logical that if a person consciously contacted Earth's self-awareness, then that person would have what could be considered a spiritual experience.
Given that these kinds of experiences occur, then it seems logical that this would be the fuel behind mankind's thirst for and knowledge of God.
Other benefits of knowing Earth is our God:
It brings God down to Earth where God has been all along.
It physically gives one spiritual ground to stand on!
It would reduce fighting over religion.
It might eventually reduce fighting over land, but not anytime soon I suspect: If there is any ownership involved between mankind and the land that supports them, then might not the land (God) own them and not the other way around? If not, did God give us the land to do with as we see fit?. If so, was that for everyone? When humans put their boundaries on the land they've received from God, was that what God had in mind? When humans inherit land from their parents or ancestors, do they deserve it? Are humans fighting over or hoarding their inheritance from God like they often fight over their inheritance from their parents? Might owning land end up being a thing of the past? Not very easily, for it certainly must not be brought about by communism (no God) or any other sort of forced land or wealth redistribution (recipes for disaster). Property rights are an underpinning, a very important basis, of civilization, justice and security. Houses and everything else built or made or grown by people must belong to the individuals who buy or make or grow them and any sort of forced erosion and/or elimination of property rights is historically replete (all the way from ancient times to the present) with examples of the disastrous consequences from doing that. (Apparently Marx never readCicero.)
When enough people realize Earth is their God and not some made up abomination, fighting and inordinate suffering will be reduced.
Personally knowing Earth will finally qualify people to meet the many, many more gods in the Universe.
It unifies all people and even all life on Earth into our God's Family.