Some CPU Fans are controlled by a Driver, and the link for you Gateway did not list any drivers for that purpose. At idle the CPU temp should not be above ~ 50C otherwise I would strongly recommend that you either replace the Thermal Paste or the CPU Fan itself.
Is the CPU Fan running at Full Speed - I am a little confused?
In the BIOS:
Smart fan Control {ENABLED}
Here is an app to sense temps - CoreTemp 0.99.6
http://www.alcpu.com/CoreTemp/
Also, some apps can control CPU Fan speeds -
http://www.almico.com/speedfan.php
od Luck!