What's your favorite unit to attach a GG to? personally I love attaching them to knights/cavs but the ultimate goal is to cultivate this cav general into a gunship. the potential damage that a high level Gunship general with blitz has to decimate the opponents army is insane. I had a Gunship that eventually reached at least level 26 because with blitz and the 100% xp, it was killing 4 weak units a turn. then it was killing any 4 units a turn, didnt matter what they were, even SAM infantry. and with the extra move promotions, make that 5 units 

make it worthwile even in a tank stack. The healing rate is just wounderful, even in enemy territory.
), so i just attached another one i got to a level 8 or 9 cav, who now as a Gunship has 120xp gaining about 8 a round, which is the same as a level a round.
it really makes the war machine self perpetuating. especialy when you couple it with heroic epic and westpoint.