Otherwise could someone tell me what the Vgs(th) actually is? I know it's the threashold but what is the practical implication if you still need a 10 V Vgs?
Vgs(th) is the applied gate voltage that allows for just the start of conduction for the drain/source path, perhaps just a few milliamps. You have to look at the graphs in the datasheet to see the actual minimum gate voltage to support higher current conditions. "logic level" MOSFET Vgs(th) rating are usually in the 1-2vdc range and then where +5vdc will allow for full device current flow dependent only the the resulting Ron value.