I've been playing Plants vs. Zombies 3 for about a week, and so far I'm having a good time.
And because there's a social system called clubs I of course searched for Giant Bomb.
Unfortunately that didn't yield any results, so I took it upon myself to create a club with just that name.
Play for awhile, and after you've unlocked the option to join clubs you can just search for that name and apply to join, and I can then manually approve since I made it private.
I've not tried joining another club myself, but if there's an option to leave a message with the application, I'd appreciate if you just typed something Giant Bomb related to let me where you're coming from. =)