Usually the embassy officer at KTM are easy and cool with H1b holder ... I got mine easily ... they were chilll... suggested me to get married. But in your case, since you have not visited 8+ years, they might try to give you some trouble. Also, I have heard stories/rumors that people with their parents having GC gets denied at point of entry ... i'm not sure how true is this. consult a good Lawyer, maybe have the lawyer write 2 letters - one to US consulate and other to the POE officer ...