But i have to make it again since i don't know the answer.
Will underground games (at least where I live lol) like the Tex Muprhy series, Companions of Xanth, Dark Seed, Lands of Lore, etc, stuff like that,see the light here in GOG?
Those are games i own but just can't play in nowadays computers but would love GOG's magic.
I know its one of those questions but...i had to ask it :P

You mean this?
Anyway, I wanna! :D

Not only indie developers, but even developers that close, if that is even possible to bring their games back

Um, GOG already has developers that have closed.
In answer to your first question, the FAQ:
Please add *insert game/publisher here* to the GOG library!
GOG has a handy dandy that you can use to post your requests for games on GOG. Just make sure you search the wishlist to see if anyone else has already added the game you want and if they have, vote for it instead of creating a new entry. Additionally, if you wish to simply discuss the games you want to see on GOG, you can post in the [url=http://www.gog.com/en/forum/general/official_beg_thread_amp_quot_this_game_belongs_on_gog_amp_quot]Official Beg Thread: "This Game Belongs on GOG!".
Will you be adding *insert game/publisher here* to the GOG library?
GOG does not release specific information on prospective games or publishers until they already have agreements in place. They will not comment on who or what they are trying to get, only what they do have. Check the site's main page for news on what is coming soon, it gets updated every Thursday.

Hmm Tex Murphy games are underground games? Wow I had no idea lol. No wonder people seldom talk about them. It's one of my favourite adventure game series though. FMVs FTW

This may seem like a dumb question, but don't those games work with DOSBox?

Nobody i know has knowledge of Tex Murphy series lol :( That's why i call it underground.
Might be, but its easier to have a setup with everything done for you hei?

You may want to try here for Tex Murphy (and possibly the others.)
Abandonia
Two warnings.
one: this is not considered legal, even if there is no legal avenue to take.
two: it will require getting a little bit of knowledge of DosBox, but there are tutorials in various places, try doing an internet search.

Good job on finding Mean Streets. I haven't played that before, only Overseer and Under A Killing Moon. I found Overseer less interesting than UAKM though. Also I've heard that the Pandora Directive is the best of the series. That game is a must buy on my list

I'm not sure that link is appropriate on gog's forum.

I wasn't sure if I should mention it way back when GOG first started, but others have mentioned Abandonia, and so I have referenced in since, and indeed linked to it.
I really wouldn't know if it's appropriate or not, but Abandonia do remove any download links if they are asked by a relevant person, or if they are available for sale. They do not endorse piracy, they just want to provide a resource for old games that would otherwise not be available.