I did notice that you can do su gvim :echo SERVERNAME and then using another user gvim --servername=GVIMxx --remote-send='!/dowhatyouwant ;-)'
Thus: If you know your admin is using vim you can easily try to get one gvim instance to execute arbitrary commands as super user!! Don't think this shuold be the case by default. In my case it does what I want but.. Did I miss anything? Cheers Marc Weber