You can use an existing page of a domain that is already linked to a website.
For example you can setup a redirect for youwebsite.com/global to map to our Geo Links.
Login to your CMS where your website is hosted
Find 'Page redirect rules' or a similar setting that allows you to configure temporary 302 redirects
Create a new 302 redirect for the specific page to redirect to your unique redirect URL provided in the Geo Link Custom Domains setup e.g. youwebsite.com/global redirects to https://2d4d3061344a51445f4f7667436d796d734d7079.gtly.io/
Save the redirect