The objective way to identify gay men is to ask if they have slept with gay men over a certain period.
The gov. actually do this in some cases i.e. when donating blood and on some other surveys for research.
Of course, you can be gay and celibate, for all intents and purposes (or can you? That's another question) ...
... but we do have a set of objective behaviours for what constitutes being gay.
With Nonbinary trans, Two Spirit, and some of the more exotic categories - we don't.
This is where the Trans effort is going to fall apart: 90% of citizens will accept someone who 'Roughly looks, talks and acts like a woman' - as 'Basically a Woman'.
Trans people could win the war instantly on those terms.
And I'll bet about 75% of Trans people would be happy with that - most of them want safety, equality, dignity.
I believe the majority of Trans people are not hugely concerned that the Pharmacy row for Feminine Hygiene uses the term 'Feminine'.
I will go further: the majority of Trans men and women actually want to be identified as those genders in more traditional terms, and they are not offended that our normative, popular view is that 'Women Have Babies' and 'Men Don't Have Babies'.
But a lot of the people (I believe the minority) promoting the movement want to push it further by dereferencing all popular ideals of 'Male' or 'Female' to make it entirely self-referential.
For example, some want to expunge normative ideals such as 'Women Have Babies', because of course '(Trans)Men have babies as well'. And since 'Trans Men' are '100% Men' in every way, and to contemplate otherwise is bigotry, an erasure of their identities, and therefore a form of 'harm' and 'violence' - the type of language those people use.
It's bit sad actually because the most aggressive voices in the community I don't think are pushing for material progress. Much like regular politics in the US I suppose.
As for UBC, I think they need a better way to accomplish their objectives, which are complicated by the fact that minorities are already technically hugely over-represented at the school.