What's the point in knowing your gates a few days out? It may make you feel better about a tight connection, but nothing is set in stone until the aircraft is at the gate. Gates and sometimes terminals can change at any time without notice.

If you have a smartphone, though, you can use the Fly Delta app to check gates from the plane. I usually turn my phone on as soon as the plane touches down, and I can check both the arrival gate and the departure gate for my connecting flight (when applicable) by the time the plane is taxiing.