You aren't the only one. Feel free to hit up one, or all, of the wishlists:

https://www.gog.com/wishlist/games#search=dune&order=votes_total

I don't know.

Last time I played Dune 2000 THIS happened:

I think the dune franchise for games is lied up in legal knots that won't be untangled by night-dive studios anytime soon. My estimate is years before the rightsholders are willing to talk.

I really want to play this game, I know it came out before Command & Conquer and was the building ground for that game.

It's a bit clunky, but I still enjoyed it. The internet archive version is even more annoying than the original, but
https://archive.org/details/msdos_Dune_2_-_The_Building_of_a_Dynasty_1992 judge for yourself.

It takes a fair amount of work to get it running on modern systems, but if it gells with you at all it's worth getting dosbox and finding a copy.

Edit: formatting

We won't be seeing the Dune Games here for a long time for the same reason we won't be seeing any Lord Of The Rings games here. The Franchise gaming rights have changed hands,leaving the games made by the previous licence holder in limbo. Basically, the company currently owning the rights and the company that made the games when they had the licence have to come an agreement. That seems hard to do. Setting up Dosbox is not all that much work and once you do it, you can pretty much just about any DOS game on it.

not so much legal knots as such, there is only one stumbling block in the Frank Herbert Estate who seems to not want anything to do with games and ignores them. However, in 2016 they made a deal with Legendary Entertainment, though I guess they still block old games and the deal will be about new ones.

In most cases the other ownerships of the games are quite clear. All the Cryo Interactive properties, for example is held by Anuman Interactive (via Microïds). But I doubt a partnership would be made between Legendary and Anuman...

The Dune games may not appear on GOG anytime soon but you can totally play Dune 2000 for free through OpenRA! (Don't know how to add links so just Google it) It's a remake designed with an open source engine and using the original assets to ensure that Dune 2000, Command and Conquer: Tiberian Dawn and Command and Conquer: Red Alert are all perfectly playable on modern PCs. You can play all three right away without needing the original disks, since they were made into freeware games years ago by EA, so I don't think we have to really worry about EA throwing any cease and desist orders as well.

They have singleplayer AND multiplayer for each game and they released an update earlier today that added some nice improvements! Also, OpenRA doesn't try to recreate these games perfectly, but remake them so they are balanced and fun while maintaining the graphics/art design of the original games. They are also working on a playable version of CnC: Tiberian Sun, which I am super excited for! OpenRA is a community run endeavour, so don't expect super frequent updates, but the people working on it seem rather genuine and reliable in their efforts to work on and finish these great games. So if you need your Dune fix, go try out OpenRA! It's super awesome!

What is Dune IV?

OpenRA changes far more things than it should, particularly in Red Alert.

Wow. This is weird. It was just yesterday that I saw the movie Dune referenced somewhere and it made me think about the Dune games and how they have disappeared. I downloaded Dune 2000 and Emperor: Battle for Dune, and played both of them for a while. I also watched the Dune movie. It was Dune day for me.

As someone has already stated, Dune 2000 is available online. It can also be downloaded but the installer will not work in 64 bit operating systems. Dune 2000 is a remake of Dune II. Dune II is really dated and, as someone else said, "kind of clunky". Emperor: Battle for Dune continues where Dune 2000 left off but the game seems quite different as far as how it plays.

As far as it coming to GOG, it seems like it is in the same kind of bind as the No One Lives Forever Series. Blame it on spiteful game companies who just can't be bothered to fix the mess.

Of course not. The new license holder will want the old license holder to do all the work to get the game out there and then want a large cut of the profits. That's the main reason most of these deals fall through.

It seems they tried... and failed.

https://www.pcgamer.com/gogs-10-year-journey-to-bring-old-games-back-to-life/

Somehow, I don’t want to know how, one colleague got a contact for them, and they unfortunately said they didn't want to revive anything. It wasn’t a case of not understanding games, just a straight-up, ‘If it’s old it should stay old’. It was so unbelievably frustrating. But of course, they have a right to that decision.

https://dune.fandom.com/wiki/Dune_IV