Hi, I work in the map industry. We generally don't get to decide what names to use for features. We apply what the local official name is (to simplify). That's why if you're in country A, feature X might be named something different than if you're in country B. You can imagine this would (and has) caused many conflicts around the world if we didn't display the local official name. (Switch your region via VPN and you can see this in action)
If Google renamed it to Gulf of America, no Google didn't, not really ... They just inserted the new official name for that feature according to GNIS.