Like this:

I will search from a US IP in an incognito chrome tab.

This market resolves based on whether the prominent header below the search bar says "Gulf of America" at the end of 2025. If there is no such prominent header, this market resolves NO.

If searching "gulf of mexico" causes a "do you mean", or otherwise indicates that Gulf of Mexico was a typo, I will click to redirect to the results for Gulf of Mexico, rather than the search that Google interpreted my search as.