Not as far as I can remember. I don't have any "gaming friends," and the people I know that do play games usually only play newer games, Call of Duty being one of the more popular franchises among them. Honestly, I can't even remember the last conversation I had about games that wasn't with my dad or my brother, and neither of them play games enough to warrant making an account here.

I've mentioned it to a couple people that said they liked PC games, but sadly it didn't seem very popular among them.

Later this week I plan to give The Witcher 2 to a friend for Christmas along with a code for the Fallout games and get him to sign up for a GOG account, so that's kinda advertising.

Yep. Quite frequently share on Facebook when something big is going on (freebie, major sale, important announcement that I agree with...), plus writing a few blog posts about GOG too, plus mentioning to friends now and then (but room to spare on the fingers of one hand for those so probably doesn't count).

Does this count?
I know a guy who works as a janitor up on the 58th floor.
GOG!

ps you may have to shrink the window, it's stretching out a little odd when maximized.

Subtle. However, that doesn't explain what GOG IS.