It sounds like your aunt lives in a rough part of Guadalajara. You should consider exploring other parts of Mexico if you are afraid of that neighborhood. That kind of sucks if you want to visit family in GDL, but Mexico is a big place with much to see. Much, if not most is relatively safe.
I’m from Los Angeles, I can honestly tell you I feel safer living in Mexico. I’m not living in one of the rich neighborhoods, either. I still follow the news from L.A., and like any big city, there is lots of crime. That crime concentrates in certain parts of the city. I’m sure its the same in GDL.