Water pump or head gasket

Please clarify if this is a 6 cylinder or V8 please.
Either way it seems unusual that water would be pouring out in the front and rear of the motor, if it was a water pump. The waterpump being at the front of the motor. So it may possibly be a burst water hose which is running along the side of the engine or on top near the center if its a V8.
As too it being a blown head gasket well, if the engine still runs quite smoothly at idle then you got no problem there..So check all hosing and piping first for leaks.

Neither, It sounds like a rubber coolant line on top of the engine that burst, These new engines are not like the old days when you could see every part and get to them, but there are probably 15 little coolant lines running back and forth on top, You will have to remove the intake to get to it. I might be wrong, so I would get somebody to check it out before tearing it apart. My truck starting doing that and I found a little O-ring shot and water all over the top of the engine. Hope this helps.

If you can see water pouring from the front and the rear of the engine/cylinder head then I would suspect a head gasket. However, why not remove those components which will allow you to fully inspect the water pump first as the chances are that you would also have to remove these items to remove and repair the head gasket. You may also find water in the engine oil or water in the cylinders which can cause locking of the engine and serious internal damage if not addressed immediately.