While I'm not 100% sure I understand what you are asking,
if you have GPF Reporter in the app (set to quietly restart on a GPF) and you sent some command to the server that specifically caused it to GPF
Peek(0,x#)
will do it
then the server will restart.
But given that I have no idea who you want it to restart, or where you are calling it from, I've no idea if this solution is appropriate. I certainly wouln't be putting it into my server.
cheers
Bruce