Not sure what Gabriella is concerned about in the first panel. Is she worried that Margo's lungs reverted back to smoky decay, and she's collapsed face-down somewhere on the streets of New York? Or does she think Margo stayed out all night partying again, and slept over at a MAN'S apartment?? We all know Santa Maria would not approve.
I don't know, but with Gabriella's newfound WASPiness, she's probably just going to be super passive-aggressive about it. Just like Bobbie Merrill!! Oh my gosh, BRAINSTORM: what if Bobbie Merrill has possessed the body of Gabriella?? Yes. That would make the new Gabriella okay in my book.