It is from the French. It actually means something closer to what a sommalier is. Specializing in wine.
It eventually evolved to mean someone who prepares food using exceptional or the best ingredients. making it gourmet food or prepared by a gourmet chef.

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It is often used as an adjective for meals of especially high quality, whose makers or preparers have used especial effort or art in presentation or cooking the meal, or for facilities equipped for preparing such meals, such as a restaurant.
$40.00
New twists on old recipes. Jazzing things up. Fusion cooking, combining strangely different and/or hard to find ingredients. And most of it is presentation, not anything you’d see slopped on a plate at a greasy spoon diner.
Usually, the term ‘gourmet’ refers to something with better quality than most people are used to…
But it can also just be marketing. If you market sewer water as ‘gourmet’, chances are someone will be dumb enough to drink the stuff.
It has to be made by a gourmet cook
LOL, good question! I had a “gourmet” pizza yesterday, it was different and better and more expensive! It was damn good though! So maybe “gourmet” means, WORTH IT!