List and manipulate framebuffer information.
fs1:\> GopTool
0: EFI_HANDLE 0xBFFE6518D8, Mode 1/5 (800x600, format 1)
0: framebuffer is 0x80000000-0x801D4C00
0: PCI(e) device 1:2:0:0
With -i, info on a specific instance can be printed, instead.
-b may be used to patch the framebuffer address.
fs1:\> GopTool -i 0 -b 0x180000000
0: EFI_HANDLE 0xBFFE6518D8, Mode 1/5 (800x600, format 1)
0: framebuffer is 0x80000000-0x801D4C00
0: framebuffer is 0x180000000-0x1801D4C00 [overidden]