The most common things are failed LIM UIM gaskets if you ever have an overheating problem. If the gaskets have been replaced with the updated ones that are all metal instead of plastic, they are more forgiving. Another high failure item seems to be wheel hub bearings, and bad wiring harness issues (broken connections)with the wheel speed sensors which will throw codes for ABS and ETC systems.
ETA: The GA is a pretty good car if you treat it right and keep up with regular maintenance. GA's are fun to drive, and I would recommend these cars without hesitation to my friends.