YES. Not just the Google class action notices - though those, which Google was court-ordered to send
and deliver, are the most egregious - but ALL class action or settlement related emails get automatically chucked into to my gmail spam folder no matter what.
And they don't ever forward spam, even if you've set up mailbox forwarding to an external address. There's no option for it. So to ever see those messages, I have to use a complicated custom rule to force it to forward all the spam to me, too.
I think it's too consistent and longlasting a problem to be accidental. I think they're spam-holing all class action notices, instead of just Google ones, so that they can claim it's just a general error in their automatic spam filter.