While I am in no way attempting to dispute the objective fact that the general consensus is that Godzilla is male and that it is easiest to refer to him as such for the sake of consistency and ease of understanding, my opinion is that Godzilla's gender does not matter, has never mattered, and that every single Godzilla film to date would be exactly the same no matter what Godzilla's gender was.
Really, Godzilla could have been female all this time and none of us would have been the wiser. She certainly wouldn't have bothered to tell us.
On that note, however, to those of you saying that "the 2014 Godzilla is confirmed to be male,""This is probably a good time to point out that Godzilla's actually a female... At the last minute we changed it from
of the Monsters.'"~ Gareth Edwards, at 10:30.
My point is that regardless of the pronouns that we assign to these characters, their genders only really
matter in very rare circumstances, and while it's safe to refer to them as male or female just as we always have, in most cases it's unreasonable to assume that that's what they actually are,
because the only reason we ever have is just people referring to them that way out of convenience.
- A couple important exceptions are in GMK, when Godzilla is the reincarnation of Japan's dead soldiers, who can be assumed to identify as male, and in Godzilla vs. Biollante, when Godzilla is treated as masculine for thematic purposes, and is contrasted with the feminine Biollante. Even in the latter case, it's important to note that "masculine" doesn't necessarily mean "male"; females can also be masculine, and anyone who claims that statistics imply otherwise has clearly never done much research on the spotted hyena.