Of course not. But what's more likely, that there was a very primordial, basic appeal to the gorilla's mind that this person was in trouble and needed help, or that that God intervened in that tiny, isolated circumstance and helped the boy?
Since we're both primates, I think that there was a tiny speck of evolutionary morality in helping the boy.
You're free to believe it was a miracle.
Evolution does not necessarily imply morality, though. Especially from a Darwinian point of view. Helping the human child was of no benefit to the gorilla; it neither strengthened his own survivability nor indicated an alteration of his genes in a beneficial way.