I don't think their culture aligns with the definitions written in the definitions section:

  Women is [a] gender term based on self-identification.

but then immediately after when defining Privilege we get

  On average women were paid $0.78 for every $1 a man makes.

Pretty likely that what they mean here is female and male rather than man and woman - the person writing this is probably not that used to talking about women and females differently.

Yeah, I read that, but it still wasn't clear to me.

>Underrepresented Group This can be defined as a group whose percentage of the population in a given group is lower than their percentage of the population of country, community, organization or otherwise.

I don't know what the "given group" is here. Is it Gitlab employees? Gitlab software engineers? Software engineers in the US? Software engineers in the Netherlands? Software engineers in the world?

I also don't know what larger population they're referring to. The cities with Gitlab employees? The US? The Netherlands? Countries with Gitlab employees? The world? Gitlab employees?

For some pairs of values atheist is likely underrepresented, but for most pairs I think atheist wouldn't be underrepresented.

Could you clarify what you mean by “coming through education”?

I would’ve thought that population representation is the definition of underrepresented because it shows they are underrepresented in the population. But I am interested if there is another way to measure this.