You simply need to point the subdomain at the Hostgator worker’s IP utilizing an ‘A’ record at that point do whatever is vital for Hostgator’s worker to perceive the subdomain as its name and to serve the WordPress there as that subdomain.
Hostgator backing ought to have the option to direct you toward the best electric showers documentation required for them or walk you during that time part and whoever has your space name or the DNS worker for that area ought to have the option to walk you through the DNS settings or have that archived.