It is basically/mostly just a guess. I am assuming that Marcus Laun has registered a website for this new company name. As far as I am aware Marcus has always/generally used his gmail email account to make the registrations for any website he owns or has owned. But if has registered a website for CannCo Brands and Development, he must have taken a different approach this time.
I am assuming he would want the words "Cannco" and "brand" in the website address, so I entered those terms in the Namedroppers.com search engine. It only produced two possible websites:
Neither of those websites have registration statements that allow you to see who actually owns those sites. But logic would strongly suggest that the second site is connected to Marcus because the name is exactly the same as the new company name and it was registered on August 24, which happens to be the date of the last GPLS press release. So far that particular website has remained parked and I haven't noticed any activity yet.
Regarding the first website: I could only find two things of mild interest. If you do a google search for that website, you can find some text that describes the site as being involved with branding and fulfillment in the cannabis marketplace. If you look at the twitter account for CannCo Brands, and click on the "following" section, you will notice that whoever controls that account seems to have a unusual interest/affinity toward Los Angeles based athletes and public figures. Marcus Laun's Growth Circle company is based in Los Angeles.