Begging more questions here. Does the gorilla have a sense of morality, or did God influence that gorilla to act against the standard set of instincts given to it? None of us can get inside that gorilla’s head, of course.
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.