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Any official info about that?
This question / problem has been solved by Lord_Kaneimage
Other then on a faq at blizzard and various news outlets saying they are coming.
the general answer is yes at some point in future
avatar
DrakoPensulo: Any official info about that?
Warcraft 1 and Warcraft 2, are going to be released on GOG, in the near future. This is a certainty.

Other Blizzard games, as they say, "no plans at that time". Probably some more will make it, probably nothing else ever. Wait a little bit and keep in mind, only those 3 titles are surefire additions to GOG!
Ok, I have found this on Blizzard website:

"Q: Are other classic Blizzard games coming to GOG.COM?
A: Yes! We have announced that we’re partnering with GOG.COM to release Warcraft: Orcs and Humans and Warcraft II. We’ll reveal more information at a later date.
"

source: https://news.blizzard.com/en-us/diablo3/22887361/diablo-now-available-on-gog-com