I don't think that gamers are inherently misogynist, and I don't think this movement really is either.
To say someone is misogynistic is that they have an inner hatred for women, and I don't see that as the case.
Gamergate is not an organized movement. It's got supporters on 8chan, reddit, and all kinds of other forums. It doesn't even have a leader. Gamergate is a hashtag anyway, anyone can use it. In addition, the people who care about ethics can't really stop trolls from posting. To ask them to not use the hashtag won't stop them from addressing their concerns anyway.
It seems like something that has been boiling up for a while against anti consumer companies and sites. I see it on /r/pcmasterrace/, I see it in facebook comments, on twitter, on any of the chans, etc.
To say it is inherently misogynist, when so many people have stood up who actually care about games journalism seems like an unreasonable stereotype.
I know a lot of gamergate supporters are actually trying to track down the people who sent threats, and I think they found one of them, but it was some dude in Brazil.
You've got Totalbiscuit, a gamergate supporter, who is actually engaging with games journalists to talk to them about their ethical concerns.
You've got boogie, a kind man who preaches an anti hate message and a love for games, and he's a supporter.
Granted, every movement has its bad apples, but to say it's about misogyny is like saying Islam is about bombing people. Disturbed individuals hop into every movement once they see it's popular.
This game has toxic people, yet the league of legends community is where I have met a ton of nice players and staff. To say everyone was toxic would be an insult to the people who have really fostered this game's community.
I've just seen so many people who actually care about ethics, that I think branding them as misogynistic would be cruel.