You will find the System Tools on your WordPress admin area navigating to the GamiPress menu -> Tools -> System tab.
On this tools section you will find a large tables with technical information about your server, your WordPress installation and your GamiPress installation.
This information is very useful when debugging, and the GamiPress support team may ask you for it at some point to help you solve any issue you reported.
At bottom of this tools section you will find the “Download System Info File” button that will allow you to simply save all of that information to a .txt file. This allows you to easily deliver it, for example, through email.