How do I use a non Google web site in my custom domain?or
Can I use a domain name registered via Blogger in another webhosting, if I quit Blogger?as if custom domains are something mysterious, and only work on a Google server. But, this is far from reality.
One of the advantages of having a domain, that uses DNS hosted on any registrar on the Internet, is that you can include any blog or web site, in your domain, that you wish. You can have any combination of Blogger blogs, WordPress blogs, Yahoo blogs, and any web sites that use DNS to direct traffic to them, in your domain.
You will have to know how to access the eNom or GoDaddy DNS Management wizard (for a custom domain setup by Blogger), or your third party DNS manager wizard (for any custom domain originally setup by you). And, you will need specifications from any third party content host, as to what DNS settings are required for their server to be accessible.
But, if you can get both of those essential items, you can setup your non Blogger blog or web site, as part of your Google Custom Domain, or instead of your Google Custom Domain, as you wish.