SoCal can verify, but from my experience, pretty much any super jumbo grouper out of Loreto is going to be a gulf grouper (Mycteroperca jordani) There are some other possibilities, but usually you have to go farther north or south.
Gulf grouper has been on the enviromentalists endangered species lists for awhile. In 2019, it was designated as endangered under the Endangered Species Act in the USA. By my non-legally trained reading of the act, it is illegal to bring into or possess the USA, or even for a US citizen to take on the "high seas" (whatever that means) when outside of the USA. There are hefty maximum fines listed, but no minimium. See section 9 and 11:
https://www.endangeredspecieslawandpolicy.com/assets/htmldocuments/blog/4/2019/04/Fed-Reg-listing-rule.pdfLast time I checked, the Mexican sportfishing limit was still two.

While gulf grouper (once common) are now a very rare catch, US citizens still catch the odd one in Baja and bring home.
Just a matter of time before somebody gets nailed. It could get ugly.
-J