Counting the existing free games with the new Ubi games from last week gave us 98 games total. Adding Septerra and Teen Agent gave us 100.
We were the ones not counting the free games, obviously GOG was.
If you count the free there is actually 102 games on GoG, if you remove the 3 free ones you goes back to 99.
Edit: I just recounted them, 20x5 + 2 = 102 the count is right :-)
Edit 2: I think you forgot Original War and Operation Flashpoint in your count...
Edit 3: Ok I read the homepage... looks like GoG themself no longer count OW and OF ^_^
We use the "see all released games" count on the front page underneath the "New to the store" tab.
We count the free games as well as they are released at this moment in time and available :)
Whichever way you count it, it's a great achievement for us.
So much hard work has been put in to get this far and there's still lots to do :)