Gmail – Use Google Inbox’s Snooze Feature

Searching for "label:snoozed" lists Inbox snoozed emails in Gmail. But snoozed does not seem to behave like any normal label in gmail as you can not apply it other emails.

According to this thread on Google Forums, this is a known limitation and they have it on the slate for future implementation. I expect that the more people tell Google they want this, the more likely Google will implement it and sooner.

EDIT

I've noticed that Google Inbox has started automatically adding events to your Calendar when you accept the invitation. This isn't identical to the functionality you're requesting, but it addresses most cases.