Georgia law has no authority in other states.
Understood. And that is why there is a special Chamber of Commerce, if you will, that spends a great deal of its time debunking claims of Vidalia-ness, marketing, advertising, outreach, education, etc.
One can grow a strain of onions sired in that area in other regions, but it is believed that the soil in which they are grown in and around Vidalia is what perpetuates the taste.
Me? I don’t care one way or the other. I was merely pointing out that there are all sorts of protections that have the force of law behind them, too.