Pointing a domain name from Google to a Homestead Website.

My friend wants to use Homestead to design his new consulting website, He already has a  business domain name that he got from Google.How does he redirect his Google domain name to his Homestead hosted website? Eventually, he may want to switch his domain name to Homestead, but for right now, he wants to know if it can be re-directed and if it's complicated.
Thanks..