Giving GLA a heli have done in many mods and they aren't so successful from wut I've seen.
Technically it's a dusty old hind maybe and transportable slots, completed with chain gun and missles, basically a mix of commache and chinook/helix?
Now see, the chinook could collect supplies while transporting tanks, while laser point defense + bunkers are optional, meanwhile the helix is basically a fat ass flying Overlord.
Now you've to come up with something unique for da chopper if ya wanna add it in your mod... Try to variate it from the choppers that are already in the game...
Make it the only scrap-upgradable air unit. Requires an infantry to get the chaingun anti-infantry weapon, and/or purchaseable rocket pods (individual upgrades, make them cheap, this should makes sense since GLA are cheap and they buy stuffs from da blackmarket and then buy extras for them), so by default it has no weapon and only a flying transport.
However I strongly disagree with adding this unit unless you make at least something like da stuffs I've mentioned happen...
