Do you know a game from those other shops i enjoy and not either already owned and as well not on GOG?

You can buy the Duke Nukem games on Zoom, but most of the games there are also sold here. ZP has rarely sales. You can get most of their games with high discounts here on GOG (or Steam). You can buy KnightShift from your wishlist for $6.99 on ZP, here on GOG you can buy it for $1.79 because of the the current discount.

Most of the decent games on itch.io you can find also on Steam or here.

Okay... so it would be useless for me, to be precise.

GOG is the only way to go.

Weird question, a game you'd enjoy. How is anyone supposed to know that?
Zoom has a bunch of educational titles, so they have that niche that GOG didn't really go to. But if you look at their bestsellers, after the Duke Nukem games there's Commandos: Strike Force, Postal III, Hardwar, Hatred, Knights of the Temple 1 and 2, a bunch of racing games, Dragon Throne: Battle of Red Cliffs, The Fortress of Dr. Radiaki, War and Peace: 1796-1815, Mega-Lo-Mania, they still have Raptor: Call of the Shadows... and I scrolled far enough I think.

On the other hand, itch currently lists almost 1.2 million titles, so... See what I said before, good luck picking. But if you check the bestsellers, you'll see entire pages at the top of the list made almost exclusively of X-rated titles. WolfQuest seems the odd one out in the first couple of pages.

It does not matter how many games they got, i simply am almost never interested. Obviously it is very subjective but to me... i can not feel like getting a quality game there, in general. We got a different taste, for sure... GOG got way more quality games, and the industry is already struggling fully supporting only the best DRM free store and to me... it is the only one: The others barely would be able to provide me... if at all.

As well, i lack the time for playing anything but the very best and even the very best is already to much to handle.

It is as it is: GOG is the only true quality DRM free store, either support it or someday the gamers can take out their caravel with a huge gun fitted on it.

Zoom is the only way to get "Atlantis Evolution" in a version worth buying. The one on GOG is basically the mobile version. It's actually the only game I own on that platform :)

Okay, still no deal because i am not much into puzzle-games, and in no way can i stand point and click-games...
Anyway, from what i see in the video it is a quality game, in its original version only. GOG should get this version... the mobile port is indeed trash, this is not a GOG game and not a GOG version, it is a disgrace.

This one is good, indeed (just not my genre):

https://www.youtube.com/watch?v=uCNssXd-I6I&list=PL6iNuXuk2gdgTzNfuKI_FRguKQ011SH4J&index=1

GOG should ask the publisher "Microids" if they can get the rights on the original version as well and then publish a bundle with both games inside. If not the GOG version may soon catch spiderwebs. It is kinda in the same class of games such as "Myst" (probably the most popular of them) but it was never my game, it is for others.

I don't know your tastes, but I know they have a bunch of 'eurojank' and stuff from StrategyFirst.
They also have some titles gog either delisted or never sold (like the duke nukem games and postal 3).