Who Protected Gus?Who Was Gus's Silent Partner?

Breaking Bad season 5 starts tonight. Will we find out who was protecting Gus all this time? One incident of Gus being protected was when the cartel in the 80's killed Gus's brother, Max, instead of Gus himself. Gus did suffer by watching the murder and his brother slowly die. My guess is that Gus had someone in Chile looking out for him.

Another incident where Gus was saved by a "benevolent" protector was at the chicken farm. There, someone shot Mike's ear and killed a "red shirt". However, even though the sniper had a clear shot on Gus, the sniper did not take a shot at Gus. Was it the same protector at the chicken farm protecting Gus as it was in Mexico where Max was killed?

How will Gus's protector react when they found out a second-rate drug pusher killed Gus? Will the protector show him/her/itself? I don't think Gus's protector will take it kindly when they find out that a failed scientist and teacher killed their man.