I guess, at this point, I have just lost the thread on what both sides of these arguments want and are trying to accomplish.
As I see it there's generally the following:
GamerGate people who want the yellow game journalism to end and want game journalists to stop acting like a clique.
I know you're summarizing here, so you're intentionally leaving out details, but it's absolutely vital to mention that GamerGate people are against feminist criticism. They want what they perceive as political perspectives out of games commentary. This goal is closely tied to the origins of the group, as it developed from the harassment of feminist critics and commentators, done in an attempt to silence them. This activity has not ceased.
Abso-effing-lotely false. As someone who has been around since the beginning, and honestly it's really offensive that people just throw this out there.
Hell, because people were fed up with this offensive strawmanning, pro-women charities have been given funds, female characters were introduced into video games and there was the whole NotYourShield by all the women and minorities who were sick of being called white male sexists.
I can't speak for everyone, but my personal problem is against the use of feminism as a shield for yellow journalism. Do I want more diversity in games? God yes, everyone is sick of the bald white male protagonist. But if one of the first articles after an exciting E3 demo is "Why was this character not a woman?", well I think that's just shitty journalism.
The gamergate hashtag was concocted directly by people jumping at the opportunity to slut-shame Zoe Quinn, full stop.
If you really want to talk about the editorial direction of games journalism you really should come up with a new hashtag.
First sentence is untrue. Second sentence is terrible advice. What's stopping people saying untrue things about the new hashtag?
As @splodge said, 100% the first instance of the GamerGate tag, as you all love to point out, was by Adam Baldwin. Have you actually looked at the tweet? I assume you haven't because if you had, you would see that the content is a link to one of the original "5Guys" videos. It is 1000000% slut shaming at it's inception.
As for the second sentence, I absolutely agree, making another hashtag is not an option. What should be done if you are honestly serious about ethics in journalism is create an official, not for profit, watchdog group. That is a legitimate way to go about this. That way the group controls the message, it has publicly identified members that can speak for others, and you can control the message from being "hijacked" by trolls because you will have an official outlet. Once you do that, and prove your worth to the industry beyond being anon shit bags, then you will be taken seriously. Good luck with that.