Post Help GNEX root!!!

Hi guys... Please I really need help.
But first, please let me explain my situation.
I am at my dads and dont a have a cable capable of transfering data nor a computer
I am quite tech savvy for my age and am underfunded for my stuff so im still stuck with a 2012 GNEX gsm and
Need to find a standalone root application for my phone, ive looked everywhere and still have no luck..
Any suggestions anybody?

Thanks heaps all!!!!!