Oh my god, to live in a world where I didn't know about GamerGate, you have no idea how I envy you.
But to now drag you into this horrible reality with me: GamerGate was this huge harassment campaign of some female gamers, basically because they dared to be girls and play video games. The pretext to justify it was that this would somehow ensure ethics in video game journalism. There was something minimally interesting in trying to follow the justifications of the misogynists conducting the harassment, in that it's completely nonsensical, until you view it through the lens of video game rules and realize they've constructed a plot of a game -- the men behind it aren't just sexist, they also don't know anything about real life and just can't understand why real life would not unfold as a video game does. So then their behavior becomes not only awful and contemptible, but also pathetic and sad.
It's basically a bummer story that reminds you how lousy humans can be.
You're missing nuances about after it spread, and it was more about developers and games journalists than Girl gamers...but that more or less sums up the unpleasant kernel, before it snowballed and nastiness grew all around. Just more polarised political horridness. I sometimes wonder if bits of this current world are just that bored they turn to hatred for entertainment. And every last one a 'keyboard warrior'.
Lê sigh.