Officially this is an estimate, but having been where these animals live, I believe we can have an exact count. Keep in mind that when we say “globally” this means a tiny region straddling the border between Rwanda, Uganda and Congo.
We are talking about a few families of gorillas, some of which are tracked daily. There is a massive conservation effort on these animals, at least in Rwanda and Uganda, they all have names and I don’t think a gorilla is born without someone knowing about it