I don't refer to myself using the terminology 'GC'. I am simply a human female who understands why we have single sex categories in certain situations, and who understands that males are not female. It is my body and its intended biological; function that makes me a woman; the way that body is perceived or judged or treated is a different matter - one which does have more social and cultural implications.
There is huge power in the female body and in its function - power and beauty in its own right. There is a great value in being female; and a unique set of experiences which are overwhelmingly positive, There is an integrity and an inherent dignity in being female. Males are not female..no matter how they present or how they perform 'femininity'. The body knows this. My body knows this.
I've never been of the school of thought that thought there were essentially no innate differences between the sexes. The whole 'equality' angle on things. That everything is socially constructed. That women's oppression down to 'the patriarchy' and so on. That if only women could be free of their biological function they would be liberated etc
Some strands of feminism came to posit that view because of the way that women and girls were suppressed and channeled into only certain occupations etc; because women were expected to give up their jobs upon marriage and so on, take their husband's name.....couldn't take out a mortgage in their own name; had no control over their own fertility, and so on.
Some of the early feminists were lesbians who wanted to reject relationships with men altogether, or women whose experience of relationships with men was primarily one of abuse, violence, rape. Being female was to be subject to oppression by men. And for many women it is, and it still is.....and millions of women do still live in societies in which there is a 'patriarchal' rule of law - in which women and girls are not permitted to engage in the full variety of human occupation, activity or interest. Look at Afghanistan, as an example; or at societies in which women are not permitted any public life, or permiitted to leave the house without a male chaperone.
Equality laws can only get you so far, though, before generalised differences start to re-assert themselves. We see this in countries like Denmark and Sweden. Those generalised differences are rooted in the roles, preferences and choices that tend to flow from having children/being pregnant/having family responsibilities.