If it is Gold, then
1 people who do own the gold edition already can enter for this game, but they won't be able to activate it, and
2 people who do not own it may activate it, but, as the app ids do not match, which means they can (and ultimately will) be suspended if they mark it as received.

If this is not the Godl edition, then everything should be fine.

However, I will say that the reason I even ask in the first place is that the vast majority, if not every single instance of this game being given away is the Gold version. I cannot say for sure, but I strongly suspect you have the Gold version in your possession.

If you are not sure about the status for sure, then you may still try to give the winner the game to see what happens, but you will likely end up having to create a delete ticket for it.

Best of luck to you, and all your entrants!