So figured out I can push an schtasks command through the GPO but can't seem to figure out the syntax for multiple machines. This is basically what I got:
reboot one time tomorrow at 12:30am using specified credentials
schtasks /create /tn "reboot" /tr "shutdown /r/t1" /sc
once /st 00:30:00 /sd 10/04/2013 /s \\server1,\\server2,\\server3 /u domain\user /p password
it looks good but the /s command does not take multiple machines. Is there a workaround to this?