Bootloader unlocked. That was the first miracle. The Go Editions were usually locked down tight. But this was a test unit, a prototype that had slipped through the cracks of a bankruptcy auction.
If it returns a # prompt, you have temporary root. You can then try to install Magisk in "systemless" mode to a boot image backup, but without an unlocked bootloader, root will be lost on reboot. root android 8.1 go
Rooting is possible but limited by: