The place to protest this isn’t Google.
We need to have everyone propose a name change to the official body in charge of place names, the US Board on Geographic Names.
Unfortunately, one of the rules on name changes is “Changing a name merely to correct or re-establish historical usage is not in and of itself a reason to change a name.”
On the other hand, they also say “The most important consideration is local use and acceptance,” so the sooner we act, the better.
Here’s a link to the form they want you to fill out: https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/media/files/DNC_ProposalForm.pdf
Thanks for following up on my comment with the most important link!
In my submittal, my reasoning also included the fact that the change to “Gulf of America” didn’t follow the official process.