Could "Guess Pass" stand for "Guess Password?"
Under the theory that all those dirty birds listed in the Q post that used "private email" and come to find out JC did indeed use g-mail. And the practice of creating drafts/not sending then the recipient logs in to the account and reads the draft.
Everybody in the network would have to know and share the password to log on and read email drfts, right?
Is there something known as a "guest password" that would be used and shared for that purpose?
Just a random thought from a non-computer savvy fella.
If that's not it, then I'm totally lost on the meaning of "guest pass."
Bagster
It shows that the person was issued a guest pass to google.
Typically, in stupid spycraft. You open a browser to a gmail account. You log in. If you know the account name and password. You write your communication in the email drafts but don’t send. and then give the account and password to your collusion friends and they log in and communicate.
Stupid people think the are secure because they are “never sending” the email. However they are, the stupid spy writes out the “seccomm” on his or her device and transmits it. Also btw google is keeping track of things like who is logging in. Where they are and what kind of porn they like. Stupid fools that thought she would win.
Bagster
Could it be as simple as investigators are currently at Google HQ perhaps collecting evidence that passed through gmail accounts? That would explain the visitor badge and the bike photo... merely saying “We are here”.