As I mentioned in my first post, I'm running totally stock. Unrooted, and the issue occurs on 3G, 4G, and WiFi, tested them before I came into work this morning.
The problem happens whenever I get a new message or manually start a sync, so I am pretty sure the problem is with the Gmail or sync programs. Specifically, the force close message says "The application Gmail (process com.google.android.gm) has stopped unexpectedly. Please try again."
Happens EVERY time sync is started by a new message or manually by me.