Those games can be still downloaded it you purchased (or reclaimed gift codes) before. As a fact, they still appear in my collection (and can be downloaded) although I got Fallout I as a gift in an earlier promotion, and the rest on 2013 christmas promotion.
The games can no longer be purchased on GoG, and if you got some gift codes on the christmas 2013 promotion can not be reedemed; if you already reedemed those codes or got gift codes earlier or bought that games, you'll still be able to download (or at least, that's what they say).
If you're interested on getting those games (but not for free), they're available on Steam. If you're interested on getting those games free... well, we all know where to get those things, but will not be legally.
I have traveled across the universe and through the years to find Her.
Sometimes going all the way is just a start...
I'm selling some stuff!