Apparently Gold Track now includes immigration at ADD, AMS, BNE, CAI, CDG, DME, IST, MEL, SAW, and SYD according to
http://www.staralliance.com/en/gold-track-immigration -- curiously, only ADD and CAI have Gold Track for arrivals immigration. Additionally, it's limited by terminal. CDG-2A, where AC flies from, doesn't have Gold Track, for example. It's only CDG 2B/C, which basically only serves AI. How helpful...