No!
Damn it, NO!
I will not bow down to the warehouse, because it is an alternative to monotony.
If Godzilla had inexplicably popped out of a warehouse in either the Heisei or Millenium series, I'd have posted the same topic in one of those forums.
Granted, its no stupider then him randomly coming out of the ground in Godzilla vs Mothra. Especially since he was tossed intothe Ocean by Kong at the end of the last movie. But, it's still a more natural and realistic enterance than randomly jumping out of a Warehouse ike some kind of Bachelor Party Stripper.
I have a new theory about this one actually...
I say he learned the fine art of miniture engineering along with the other unusual mental feats he performed in this movie, such as not only understanding the MechaGodzilla was forged out of some kind of metal, but realizing that by way of lightning storm he could turn his own body into an electromagnet to stop him.
So, REALLY SMART Goji builds a perfect warehouse replica as camoflage to deal with MechaGodzilla after anguirus tells him all about the imposter.
"Godzilla would have a brain no bigger than this marble."
You don't say, I think you MIGHT have been underestimating him a bit there , doc.
-Ray