Gmail and Facebook on edge notications

Hi. I was wondering if it's possible to show notifications from gmail and/or facebook for the 5 contacts I have on my edge screen? I don't mean a distinct, separate notification; I mean linked to the contact so that when I get a notification from them, it appears in the same way a txt message would. It does appear to work for the Samsung email app, but not for gmail or FB.

Edit: Just saw the title typo. D'oh!!