I'd bet with fairly high odds (and hope) Gmail whitelists locally. If Alice thinks your mails aren't spam but Bob does, I would want Alice to get your mails nor

I'd bet with fairly high odds (and hope) Gmail whitelists locally. If Alice thinks your mails aren't spam but Bob does, I would want Alice to get your mails normally but Bob to be able to keep ignoring you, implying a need for local blacklists and whitelists with a reasonable set of defaults. If Alice + some large number of others think you're alright, maybe you'll be promoted to not being flagged as spam by default. Bob might then just have to take the action of marking your things as spam to invoke a (hopefully) local spam/blacklist rule.