How to rename #gkHeader menu name

I have changed the named anchored by going into Template, menu and changing the names and ID there and then changing from the top menu. I didn't find from where to change the home link which is "#gkHeader" I can change it in the menu and assign new one but where exactly the other place to change the actual Anchor tag? here is the link http://staging.exceptionalroofing.ca/

Hi,
#gkHeader is the name of top section from template, and in most cases is used for Home item and Go Up button.
Instead you can use #gkTop