The comment above is a little bit of a stretch (I'm not sure I'd equate working more to toxic masculinity exactly), but this isn't about being a man: the CTO may have been female, that in itself wouldn't invalidate the comment.

Masculinity in this context is about gendered behaviours (behaviours traditionally expected of men). Toxic masculinity is any such behaviours that have a negative impact on the subject, those around them, or society. Women can also contribute to toxic masculinity.

In fact, within certain corporate cultures, where promotions have traditionally been awarded to men, it may benefit women's careers to adopt such toxic behaviours.

Where did GP say the CEO was a man?

Oh, my God! I'm part of the problem!