There have been quite a few gorillas, in captivity, who have adopted kittens, puppies, or, in the females' cases, other gorillas' babies, when the mother has shunned them. They have all treated their "pets" with care, kindness, and gentleness; you could even say "love".
Unlike lions, gorillas don't kill other gorilla's offspring, though usually, there is only one adult, silver back male to a group.
I'll really have to ask the kiddo about all of this.
Sad situation all the way around. I really think the poor animal was startled and somewhat confused really. It just didn’t know what to do with this little thing that suddenly and literally fell into it’s world. It probably didn’t help things when people started yelling. That probably caused the gorilla to think there may have been a confrontation coming.