I don't think there's any way for socialization to be "binary". Socialization always continues; it's a process. I think of it as a person's collective individual and general/cultural social experiences. Anything from interpersonal relationships, brief social exchanges, movies, gender norms, advertisements, work, school, etc. It also has to do with how you are treated by who and why. It's highly complex and not the same for anybody individually. However, some groups of people are socialized similarly in some areas due to their sex, sexual orientation, race, color, nationality, disability status, mental health, income level, etc.

GC and QT refer to socialization like it's in the past because most of the time they are having discussions or debates as to whether a person can be a woman even though they did not experience the same socialization that most girls go through.