No, you need the specific cable.
The GPS uses a PS/2 type of connector, but it doesn't pass to a PS/2 port on a computer. That port doesn't have any way of receiving the type of input that the GPS sends.
you cant use your adaptor but you can use an adaptor - if you scroll down that ebay link there is a laptop diagram with a part number A-6013 which is a usb cable adaptor
thanks for all you help guys. I will just go with the ps2 one and be done with it.
I have a USB mouse anyway I could always hook it up to the mouse port on any futher computer I get.