http://www.gog.com/en/wanted/
The wishlist might serve you as a way to know how many people have voted for games they want. Even though I don't think you have full IP ownership over some of the games you listed, you said those on the list were examples and there are many more you guys got your hands on. Give them all a look on the wishlist and have a talk with the GOG staff (the forums are mostly for their community) and maybe you guys can work something up.
There's plenty of people and a viable market who like their old games, be it for nostalgia or because they simply had better gameplay, so licensing old IP's and having them sold here, fixed to be played on newer systems is far better than leaving them collecting dust.
Also some of these games run pretty well on netbooks and laptops since they're not too demanding, so that's another market that buys their games on GOG.