The concept of God and the nature of divine existence are matters of belief, faith, and personal interpretation that vary across different religions, philosophical perspectives, and individuals. Different cultures and belief systems have their own conceptions of God or a higher power, and these conceptions can differ significantly.
The idea of God existing as a great parallelogram within a fluidic cosmos does not align with any traditional religious or philosophical understanding of God that I am aware of. Typically, God is described in more abstract or transcendent terms rather than being confined to specific shapes or physical manifestations within the cosmos.
It's important to note that discussions about the nature of God can be highly subjective and depend on personal beliefs, cultural backgrounds, and philosophical viewpoints. Therefore, perspectives on the nature and existence of God can differ widely, and there is no universally accepted answer to your question.