Side by Side Navigation Menu in Header

Hi there,

Not sure if I fully understand.

This is the header in the site you've linked:
https://www.screencast.com/t/8uv0hVnoWGjI

I'm not sure what you are referring to with "side by side".

What are you trying to do exactly?

Yes please check the menu on the right side in header. They are showing Vertically. I want to show them in an horizontal way

Try using a secondary navigation and set it to float right:
https://docs.generatepress.com/article/secondary-navigation-location/

I am already using secondary navigation. I want the menu items in the Header displayed in horizontal way

The current vertical menu is added using a header widget and not GP's secondary navigation option.

Can you try setting the secondary navigation to float right in the customizer?
https://docs.generatepress.com/article/secondary-navigation-location/

Please provide css for the vertical menu widget

Can you try my solution of using the secondary navigation first?

There shouldn't be any CSS required if you follow my suggestion.