Okay. Then can you try explaining this better please, what actually do you mean?:
"Can I use Wi-Di (wireless display) if I use GPU in mobo?"
I know what "Wi-Di" is, and I also know that your motherboard has Wi-Di.
According to the information on the ASUS website you need an external adapter to use Wi-Di. This is sold separately.
See the paragraph heading Wi-Di on this page: http://www.asus.com/Motherboards/P8Z77I_DELUXEWD/