Well, IMDB lists her as Delgado-Pritchett.
I’m not sure what to tell you. Some places have her last name one way, others have it the other way. Our tag for her is “Gloria Delgado-Pritchett”, so we’ll just stick with that. :]
EDIT: as someone pointed out, Manny’s last name is Delgado, so Gloria might have decided to keep it as well.