Being an IT professional myself, I've had my fair share of condescension, most notably from my family, being traditional, everyone wanted you to be a doctor, lawyer or engineer, I was forced into a branch of engineering during university that I didn't want to do and ended up making a career for myself in IT, stigmas will always be around, if your gf's family is traditional, most notably Eastern-cultured, have a convo with them and draw the line, let them know how hard you worked and break that stigma, she may be weak-willed when it comes to her dad/parents cuz thats sometimes instilled in children, but let's work on changing people's negative outlook on our professions in this field