What does it have to do with gaming? Or is there bug with my instance?
I'm seeing 
!gaming is a community for gaming noobs through gaming aficionados. Unlike !games, we don’t take ourselves quite as serious. Shitposts and memes are welcome.
1. Keep it civil.
Attack the argument, not the person. No racism/sexism/bigotry. Good faith argumentation only.
2. No sexism, racism, homophobia, transphobia or any other flavor of bigotry.
I should not need to explain this one.
3. No bots, spam or self-promotion.
Only approved bots, which follow the guidelines for bots set by the instance, are allowed.
4. Try not to repost anything posted within the past month.
Beyond that, go for it. Not everyone is on every site all the time.
As a third party user, I also see the icon only on feddit.io view of the community and not on the lemmy.world view of the community (or on midwest.social). In fact, I don't see any icon on LW or MS, just feddit.
I wonder if the community had it up last month and the change to the icon didn't federate.
It's been that way for as long as I've been seeing it - months and months. I assumed there was a high level of inclusivity amongst gamers. I mean lots of people like to game.