Does Zorah Magdaros Die?

Zorah Magdaros cannot be killed by normal attacks, and can only be repelled through a siege encounter. Its head and chest can be wounded by physical attacks, while it is also immune to all status effects.

Is Zorah Magdaros dead?

It was learned that Zorah came here to die in the Vale, as many elder dragons did, and its body, filled with bioenergy, would would break down and provide fresh nutrients and energy to the ecosystems above.

Is Zorah Magdaros bigger than Godzilla?

Regardless of whether that refers to length or height, big ZM doesn't have an exceptionally long tale, so the numbers wouldn't be that different. Either way, that's a fair bit larger than Godzilla.