However, look at page 8 here for why this is pointless.
Gender at EGMO
Another thing brought to the Jury was whether or not to make clearer the gender-based criterion for competing at EGMO. Currently, the General Regulations state ‘Contestants must be female’ and ‘Each invited country is entitled ... to send a team consisting of up to four contestants’. EGMO in general cannot dictate how the countries choose their teams, but there was a proposal to specify a ‘loosest possible criteria for who is eligible’, which would have been some combination of ‘anyone identifying as female,’ ‘anyone not identifying as male,’ and ’anyone assigned female at birth.’
Many people contributed to the discussion, with ideas on how to make EGMO welcoming and suggestions from their own national girls’ Olympiads. The general consensus was that ‘the EGMO Jury is not qualified to define “female”, and the General Regulations will do as they are for now, but we’ll keep this discussion in mind for the future.’
I should add, for any young trans mathematician who is keen to compete at EGMO, that the discussion was overwhelmingly positive. Many leaders were keen to share their experiences of how they managed to simplify the process for trans students competing in girls’ national Olympiads. For example, the Mexican leader brought up the example of the Mexican girls’ interstate Olympiad, which follows a very similar format to EGMO. For this contest, any team Leader wishing to bring a student whose documentation doesn’t say ‘female’ should write a little note to the Jury asserting that they’re not male, and that’s that. Though no decisions were taken this year at EGMO, I can imagine that, if a decision is ever taken to update the General Regulations, it will be something very similar
So, in summary, this is an event for girls, but any boy is welcome if he wants to pretend to be a girl. These people sound insane.