How (HDMI? component? other?) are you connecting the AVR to the TV? According to the manual, is the GUI available through that particular output?
-- Edit --
I couldn't find anything in the owner's manual stating that the GUI is only output over a particular type of connection. So, I'd try the HDMI output as well as the component and composite "Monitor Out" outputs.
Edited by eljaycanuck - 9/5/13 at 10:16am