Who's developed and published Baldur's Gate?
-Black Isle Studios
All of whom have material represented on GOG.com.
Of course if there has to be some sort of license regarding Dungeons and Dragons, that may complicate things.
As far as I know (and correct me if I'm wrong) these games are out of print, so I feel like we have a pretty decent chance.
But when it comes to rights and licensing, nothing is ever certain until the papers have been drawn up and signed. Having no evidence of this, we'll just have to wait and see.
Gametap has had them both for quite some time, so there shouldn't be any licensing issues with them.