gkrellm config consultation

Grettings,

gkrellm I have configured to display temperature and fan speed, the problem is that I want to create an alert to the micro fan for example, that when you reach a minimum speed the alarm and run a command such , poweroff and off the computer.

The problem is that the only command I can run with root, it could happen to gkrellm command for me to turn off the computer automatically if the alarm goes on?

Thank you.