I think we can all deduce what actually happened here. Either she was medicated/passed out drunk and Gloria genuinely wasn't sure if she was alive or not, and called IG saying she's unconscious, what do I do? And IG responded to check if she was breathing. When she was, he sighed because he knew she wasn't in any real danger, just passed out drunk again.
Either that or AE feigned collapse, but not before saying 'I feel so unwell...call Ioan...tell him I've stopped breathing...*faints*' and so Gloria calls IG...and it may not have been the first time this has happened. (This would make a great meme for one of
@ReturningthePearls memes)