I appear to have found a way to get an enemy to follow me through a gate in a mod. I had told an enemy (its a bit more complicated than that, but that is irrelevant) to escort gPlayerShip. Then I went through a gate, and he appeared on the other side. Although he wasn't shooting at me (although he responded in kind if I shot at him), that could probably be rectified (how many uses am I going to find for periculi's event manager after it can no longer be retrieved...sigh).
Just thought I'd tell everyone about a weird/interesting/potentially useful thing I stumbled upon.