Change #gkHeader

Hello,
I'm looking to make my URL's more SEF. Could you tell me where to find the #gkHeader in the "What we do" section? I have found where to change in the slides, but I cannot find the area to change the jump link. I have reviewed the documentation but can't seem to find the answer there or on these boards.
Example: http://www.ilivewebsolutions.com/
Click on "what we do" and you are brought to: http://www.ilivewebsolutions.com/#gkHeader

I know where to change the link so it would be: http://www.ilivewebsolutions.com/#MyLinkName but then I need to know where to connect it so the link will go to the correct page just with a new name. If I just change the same within slides it doesn't go anywhere, obviously

Also, will I have trouble using sh404SEF? This is my first site like this and don't want to start breaking links.

Thanks!

Screen Shot 2015-07-09 at 11.09.08 AM.png

Hi,
is here

here.png

this is not extremal link, but anchor link.
And Opss, probably you have to edit template code to change it.
That template didn't have option to change it from template settings, like modern ones.

That's unfortunate.

Could you please tell me what file to look in to make this change?

layout/default.php in template folder