Ok close gparted
Open the Install Zorin App from the desktop.
When you get to the screen that says, "What do you want to do?"
It lists:
)Install Zorin Alongside...
) Clean Install..
Let's try the Clean Install that wipes the drive, first.
If no-go there, when back to that screen, choose "Something Else" and use the Partition manager in that window to delete and reformat the partition.
Some sort of guide to installation is required, plus how to inhibit various UEFI, safe start features (difficult as it varies between machines) and how to set up the recipient HDD, SSD etc, etc.Perhaps it already exists, but where?
That message means that in LiveZorin, the source for installing is currently from the USB packages.
Are you able to connect to the Internet in Live Zorin?