Can a PBP use GRUB?

[amiraeva]

So I finally got a 3V serial cable, and after playing around with uboot I managed to boot into grub as an efi executable, and then into Manjaro once I was dropped into the grub shell. The issue with my approach is that it was a manual process in the serial console. Does anyone know how I can go about automating this a little better? And more importantly, how to go about getting grub to initialize the LCD display and keyboard so this endeavor would be useful (i.e. allow one to choose between boot entries)?

In the meantime I can automate some of the tedium by using a uboot script. Not familiar enough with grub to have that part automated.