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As I explained to Google (from Dan McClellan) _references do not assert from fiat what things are called. A dictionary definition is not an official definition but what a word means or what a thing is called at the moment.
Most of the world calls it the Golfo de México or in English speaking regions, the Gulf of Mexico. Changing all the maps of the world won’t change this.
Now granted, a state chooses what to call itself (such as the changing of The Ukraine to simply Ukraine but that is the incorporated entity that is the sovereign nation of Ukraine.
As the US does not have sovereign control of the Gulf of Mexico, it doesn’t get to declare the name of a region of international waters.
This whole thing just makes the GOP, MAGA, the Trump administration and by proxy the people of the United States xenophobic and barbaric as hell. It’s not a good look.
Um no.
A state can decide what it names itself or names a part of itself (e.g. Black Lives Matter Plaza). The story of Ukraine illustrates this.
But geographers and cartographers don’t decide what to name a place or get orders from states by fiat (unless the mapper is a state agent working for a department) They name things based on what they’re called.
The gulf is known to most of the world and the International Hydrographic Organization as Golfo de México or in English, Gulf of Mexico, and calling it the Gulf of America (say by Google Maps) is political allegiance signaling, that they are MAGA or MAGA collaborators.
If you want to be spicy you can call it Chalchiuhtlicueyecatl or the House of Chalchiuhtlicue based on the South American deity of the sea. It has a nice ominous Siege of R’lyeh feel that reflects the tempestuous weather of the ocean expanse.