To be honest, I can empathize with where the original poster is coming from. He's bought a video card that came with a free game that he's not personally interested in. Of course there is absolutely nothing wrong with that, not everyone is a fan of RPGs and even if they are, The Witcher game series is not everyone's cup of tea no matter how great it is. I personally love The Witcher series and while I don't own the 3rd instalment yet, I will be looking to get it at some point in time, but every gamer out there wont necessarily be interested.
So from there, he has something he doesn't really need or want and is simply trying to do something useful with it, and there's nothing wrong with that either. Just exploring his options, and the possibility of getting a refund was certainly something to investigate if he didn't know if it was possible either way. Of course when it comes to free games bundled with hardware for free they're more or less take it or leave it but it's yours for keeps either way, but everyone doesn't necessarily know that, and there is no harm in someone asking others if it is possible. I also don't see there any harm in someone having the desire to exchange something they have that they're not really interested in with something they might actually want. Whether it is possible or not easily is a completely different question but you don't know until you ask, and that's all I see happening here is someone just asking for information. It's not a demand, nor is he being hostile, it's just a query for information.
We do have a generally great community here, but surely as a whole we can provide information/pointers to people in a kinder manner without making negative assumptions about their personal intentions and getting on the defensive.
EziodaFirenze: So i was wondering, i got this game from gtx 980 as a gift, can i get a refund of it and somehow get my money back somwhere like to steam or a credit card if so how?
To the original poster though, as moonshineshadow suggested above you may be able to trade your Witcher 3 game code for another game that you're interested in, or even for a few games depending on what others might be willing to trade for. The trading forums exchange games on various online gaming distributions including GOG.com, Steam, Origin, Desura, Uplay fairly regularly, with Steam codes making up the vast majority. If I might offer a word of advice it would be to maintain your already polite manner even should someone criticize you or get defensive or offensive about what you're trying to do. Sometimes newcomers can be targets of bullying if they say things others consider outside of the norm, but don't let that discourage you.
I for one would rather welcome you to our community than judge you or your intentions in a negative manner simply for not being interested in a video game and seeking out answers to your options. Perhaps we can assimilate you into our GOG.com DRM-free gaming experience in the end. :)
Best of luck finding a new home for your game or someone to trade with.
Take care.