The change follows an executive order by US President Donald Trump renaming the area.
Google has previously said it has “a longstanding practice of applying name changes when they have been updated in official government sources”.
“People using Maps in the US will see ‘Gulf of America,’ and people in Mexico will see ‘Gulf of Mexico.’ Everyone else will see both names,” it said in a statement yesterday.
Google said last month it would also change the name of Mount McKinley, the nation’s highest peak, from Denali following Trump’s order.
Former President Barack Obama renamed the Alaska landmark to Denali in 2015 as a nod to the region’s native population.
But that change hasn’t been made on Google Maps as of today.
Both changes stem from an executive action that Trump signed shortly after taking office, saying the changes “honour American greatness”.
The order criticised Obama’s decision to rename McKinley as “an affront to President McKinley’s life, his achievements, and his sacrifice”.
Drawing parallels to Trump, the order notes that McKinley “championed tariffs” and was assassinated “in an attack on our Nation’s values and our success”.