Google Maps will show "Gulf of Mexico" to users in Mexico and "Gulf of America" to users in the US. All other countries will see both, with "Gulf of Mexico" being the primary name.Google Maps uses now Gulf of America worldwide, no matter your location … I agree, though, that should be localized based on what your official government calls it…

Gulf of America name change in the U.S. — what you’ll see in Maps
In the U.S., the Geographic Names Information System (GNIS) has officially updated “Gulf of Mexico” to “Gulf of America.” As we announced two weeks ago and consistent wi…