The renegade gunners are posed as if the gun is being shot, only nobody is shooting... 
The problem with GWM is that you can't use all gunners, as some are handling the gun and others just sitting around ON the gun. Looks silly.
That's the problem I find with almost every artillery piece that has been modelled, no matter the scale or period. I know most minis are used for gaming, but I just wish that someone would release a gun with a
full crew, not just 4 extraneous dudes.
I notice that the Perry Twins, though, have released a set of extra Foot Artillery crew figures that will work with their French Napoleonic gun teams plus a set of Infantry 'helpers' dragooned into hauling the gun around. Now you can model a gun with 7 or 8 figures working it, a much more realistic situation. Definitely on my future 'to buy' list!