NRamjuttun: First off I have a lot of respect for GOG, so I don't want to do anything against their rules, but I don't know morally if it is right for me to, after i finish my game to delete it from my library and give it to a friend like I would with discs when I used them, even though I am still buying the game and not just a license to play like Steam, it's the fact it's still a downloadable game and it kind of pushes it for me, so any answers are appreciated.
Ultimately, nobody here in the GOG forums are legal experts, and a true legal expert would be unlikely to leave any authoritative comments on a public gaming forum, so take that into account when you review the responses received.
Having said that, the correct legal situation that applies to you specifically will be a combination of International law and your country's own laws with regards to intellectual property, and what the end user license agreement is on each individual game you have purchased. There are no 100% solid rules that apply to all games on a global scale with regards to the law.
On the surface, the layman might assume that because they can purchase a physical game on CD/DVD and then sell it or give it away at a later date if the laws in their country permit this, that doing the same thing with a digital download game should also be legal. However, if one actually investigates what the laws of a given country actually has to say about this, it very well may not be the case. It is my understanding that in Canada and the United States for example, that video games, movies and similar entertainment content purchased online in digital download format, we do not in fact own but rather we have licensed that content under specific terms outlined in the EULA or whatever licensing agreement and are bound by the terms found within. Normally these agreements do not permit the resale or redistribution of a copyrighted work because we technically do not own it. In other words the laws of many countries consider digital goods to be very different from physical goods purchased on disk.
Many people out there have strong opinions on what they think "should" be legal and why, and may express those opinions as if they are legal fact, so be careful to not make decisions based on random people's opinions of what they think the laws should be that do not match up with what the laws actually are. Research the laws that pertain to you and your own country specifically from an authoritative government source where you live, or a legal organization that is in your own country.
Don't take random legal advice from strangers on the Internet (including me), regardless of how well intentioned they might be - they are probably wrong. Get direct legal advice from a proper source, contacting an attourney directly if necessary. That is the only way to get accurate information on such matters.