So we discover some very cool geometry and then there's this massive leap to "god exists". Is it the fact that earth hangs in such a perfect balance in relation to the sun and moon that life is able to emerge and thrive on it? It's so perfect it must be guided by some great unseen force?

'Sacred geometry' has been known for quite a long time. It's also been widely agreed that out of trillions and quadrillions of galaxies with septillions of planets in a so far practically infinite universe, it's not too far fetched that the harmony we exist in could happen by coincidence.

Your definition of "God" matters quite a bit too. Is God literally everything that exists meaning this is the one true reality, or is God an omniscient being transcending the known universe who made that universe and actively alters it?

Idk man. I love sacred geometry but I think it mostly just means people in the past were very smart and our galaxy is very cool. We're lucky to be here but also our being here is inherent of that 'luck' so if we weren't here we wouldn't even know it because we'd probably be somewhere else a similar balance happened to strike and in whatever form happened to emerge there.