GO members access the same redemption inventory as other AM members. The only difference is that GO is placed at a higher priority on the waitlist.

One thing to keep in mind for redemption is to always be flexible in your itinerary. For example there should be availability on 8 June for HKG-LHR on BA, and while there is little or no availability around 24 June for most OW airlines, CX278 on 25 June is currently available (you'll need to work out the connecting leg also, of course).