TRON 2.0 has been released on GOG.com today, at an introductory price of $9.99 USD!
I had already speculated that the game would be showing up there soon, a few months ago. Based on some datamining that someone did of the GOG site. It arrived a bit later than expected (December instead of October), but it’s here!
Right now, I have no idea how well all the mods for TRON 2.0 will work with the GOG version of the game. (Someone posted in the GOG forum that supposedly the Killer App Mod works fine with the GOG version.)
Regardless, I’ll test all the mods and see how they work with it. And make any adjustments to make mods work better with it, if necessary. (GOG did not contact LDSO or give me a heads-up about this release, in any way.)
Right now it doesn’t include any extras like GOG games usually do (wallpapers, soundtrack, etc.), but if GOG is willing to work with me I may be able to provide some rare extras (if they can’t source enough from Disney).
Thanks to Employee_427 on Twitter for the tip! (Apparently GOG hasn't even tweeted about the release on their Twitter account yet, at the time I’m writing this!)
March 21st, 2017 UPDATE: I'm late in adding this, but I wanted to mention that thanks to PaulTheTall and his ThePortingKit project, it's possible to quite easily play the GOG Windows version of TRON 2.0 on OSX/MacOS on a Mac.
I've also since tested all the existing TRON 2.0 mods with the GOG version of TRON 2.0, and posted my results on the GOG.com forum here. The short answer is that, yes, they all work without needing any updates.