gyh means (get you hip) like someone gotta tell you sumthing about what happen with them.
" dang mike i forgot i gotta gyh on sum with ole girl".
Stands for "Get Your Hole", a working class phrase meaning to have sex
Fred: Dude, she is so damn hot, should I go and talk to her?
Dave: Yeah, off you go and gyh :)
Gyh
Yo tonight this girl is going to gmh
Or I am going gyh
Meaning give you head