If no one has attempted it, how could they possibly have a time frame on when it will happen? I mean, if they knew enough about it to know exactly when it would be successful, they'd already have enough knowledge to be successful, thus they would already be doing it. It's not like you put a disc in the drive and 9 months later a baby pops out, hacking can take anywhere from 30 seconds to 195 years.
That's a moot point, though, because people have already ripped GCN music. However, the GCN doesn't use one specific music format. Neither do any other modern systems. If you can't find GCN music, then you must suck at Google.