Well the left ones really fits with both versions of Gilda from my fanfic (There's a former human Gilda and a normal Gilda... it's complicated, so you might want to read it). The bottom left one is more like the normal Gilda that fits her sarcasm and it's most likely the expression you'll see the most if you're her friend, especially if she's forced to put up with you. The top left one really fits the more "mellow" version of Gilda who's nicer and is dating a guy already. Anyway, the expression on the top left matches what she says in my fic which is basically, "There's nothing you can say or do that will make me think less of you." Just before her boyfriend reveals that he's a brony (... Yeah, it's complicated).
The other expressions I see is when Gilda either has a boyfriend or have a friend that really mellows her out, a lot.