Go arounds should be part of the retraining every 6 months, practiced in several different situations. The emphasis should be centered on what is not carried out on normal line flying, to state the obvious. Have witnessed quite a few GA's mishandled by some very experienced and competent pilots, in the sim. A GA is not normally an emergency maneuver but very quickly could become one, if not carried out correctly.
If I wasn't offered what I thought an acceptable amount of GA's at retraining I would request more.