I am trying find more dos games listings

And have you tried an internet search? Just ooff the top of my head, Wikipedia, archive.org, mobygames.

[url=https://en.wikipedia.org/wiki/Category:DOS_games]https://en.wikipedia.org/wiki/Category:DOS_games[/url]
https://www.mobygames.com/game/dos/bad-blood
https://archive.org/details/softwarelibrary_msdos_games

I'm going to attempt to be psychic here and ascertain that our user here meant more locally to the website; which indeed, GOG baffling doesn't appear to have a filter to separate out specifically DOS titles.

If it uses scummvm is it still a dos game?

Yes, scummvm is an emulator, it does not alter what the game was built for any more than run a SNES emulator and playing mario doesn’t make mario a windows game.

In most cases, but with rare exceptions.

any specific genre?

That's a good way to go about it.

Then check a game's store page to confirm the release year: anything released before mid-1995 is almost assuredly a DOS game. And if you look at the bottom of a game's system requirements on its store page and see "This game is powered by DOSBox" or "This game is powered by ScummVM" -- that pretty much confirms its DOS based.

Can someone take a Scummvm gog version of the game and run it in dosbox?

It would take some work to setup the dosbox configuration files but "probably?
"


That is, if the original game files in the GOG version used DOS compatible code, and weren't Apple/Commodore/etc code that was only readable via the SCUMMVM interpreter

Depends on the game. ScummVM works like GZDoom (you just add the WAD files) - you just create a folder per game and add the relevant datafiles then add the folder to ScummVM and it'll pull all the data from them completely bypassing the original .exe. The problem is, GOG have recently dumbed down their own installers by unnecessarily removing the .exe's from DOS games so you can no longer run them in DOSBox. However, if you still have the disc versions of the games (or re-acquire the relevant .exe's from "Abandonware" sites), then they should still run fine.

Sometimes*. Does it matter (much)?
I like Scummvm better because it's easier to emulate Roland MT32 sound. And you can resize the window while playing the game (windowed). Other than that, I don't know of any reasons to prefer one over the other.

*See AB2012's post above.

In some games fortunatelly the original content exists or it was added later. At least in my library Gabriel Knight Sins of the fathers has all the files, including the exe, intact.

Greetings