Well I just went searching for a key number so that I could order a replacement key.
First thing I checked was the ignition... yep someone pulled the cover off which had the number on it...
Ok lets look at the fuel tank, nope no number there either, but hey my screwdriver can lock it so that is cool.
Ahh the steering lock, success! Lets just hope it is the same as the ignition!
Until then I have rats nest of a harness that once belonged to a GS, I think there is an ignition barrel in there granted the wires aren't burned to a crisp.
If it works out that the key is different to the ignition... at least I can lock the steering.