Been looking through the forums, but I haven't stumbled upon this particular problem. On my lock screen I got my notifications for my Linked Inbox, yahoo mail accounts, texts, etc., but nothing for Gmail. Any ideas?
Lock screen will show; Messaging + your first three email inboxes. If you have additional email accounts they won't show. If you have one that you want to appear, delete one of the first three which will shift everything forward an then reinstall the deleted email account, which will be at the end of the line (and not visible). Or, you can link you email accounts together.