Ah thank you.  That makes much more sense.

Yes you are misunderstanding the ability.

> 0: You get an emblem with "As long as you control a Gideon planeswalker, **you can't lose** the game and **your opponents can't win** the game."

The opponent is not his opponent.

Yes you are misunderstanding the ability.

&gt; 0: You get an emblem with "As long as you control a Gideon planeswalker, **you can't lose** the game and **your opponents can't win** the game."

The opponent is not his opponent.

So I'm new to MtGA and haven't played paper magic in over 15 years, but by my reading if my opponent controls Gideon with the emblem and then casts Approach of the Second Sun (for the second time) to win the game it seems like it would fail and the game would continue until he removed his own Gideon.  Am I misunderstanding something?  I just lost a game in MtGA to this exact situation.

Gideon does nothing against Approach?