Tabs on dropdown menu

I would like the dropdown menu to function exactly like microsoft.com's menu.

Here is my url demo.wmpos.com. I got it to function how I want it by using Tabs GK module on the menu but the problem is that the menu is not responsive as you can see on the demo. Is there an easier way to get the menu I want and still be responsive? I just need the menu to move as needed so that it can be seen when it reaches the edge of the screen. Also I would like to add a hover bg on the tab menus.

Sorry but this kind of changes are not covered by our technical support.
I would suggest to search for an advanced frontend developer or hire a member of the gk team for this custom job.