sandrose Hi
GK Reporter comes with several layouts (some homepage layouts and the default one). To have the homepage looks like our demo site, you need to clone the default template style to have style for homepage specific and assign home layout for it:
Next, you need to create modules and assign to associated positions in homepage, I just created some modules for you and you can see them now.
You can check out this documentation for other modules: https://www.gavick.com/joomla-templates/reporter/install#home
Regards