In order to support RTL for a template, it will require much of work on styling. Unfortunately, GK Evonews template doesn't support style for RTL by default so I'm afraid that you have to customize it by your own.
So here are some steps:
1/ Install RTL language package
2/ Create template style for each language
3/ Create menu items for each language
4/ Create modules for each language
5/ After setup the layout / module, you start working on CSS style, something like:
/*your style goes here*/