Well, most of it is copied from Tiberian Sun.
Suggestions are welcomed.
Light Infantry
Basic Infantry.
Disc Thrower
Almighty infantry, throwing discs to cause damage.
Medic
Heal other infantry, of course self heal, too.
Hijacker
Rob enemy vehicles for us, have an amazing speed.
JumpJet
GDI flying infantry. Beacuse of enemy's weak AA defense, it is very effective in battle.
Zone trooper
#Not done yet#
Ghost Stalker
Hero infantry, his railgun can destroy vehicles, infantry and structures easily.
Harvester
This unit is used to gather Tiberium, now it is same as Nod's.
Hero vehicle armor.
Titan
GDI main battle mech , heavy vehicle armor. Commanders use its AP cannon to destroy enemy's vehicles and buildings.
Wolverine
GDI anti-infantry mech, cheap and high-speed. It has a double-barrele machine gun and a little poor armor.
Amphibious APC
Amphibious infantry transporter with a machine gun. The 5 soliders in it can attack outside.
Hover MLRS
High speed AA vehicle, Radar is needed to build it. Same as its in Tiberian Sun, but missiles launched are more effective to building and vehicles.
Mammoth M.K.II
Hero armored unit in Skirmish Mode, Tech Center is needed to build it.
It can hold up amounts of damages with is hero vehicle armor, using its railgun and missile to clear the battlefield
Disruptor
Mixed with Titan, supported by Mammoth M.K.II and Wolverine, with its Sonic Wave, Disruptors fight against Nod forces, and to make its more effective, we have removed its friendly fire.
Juggernaut
GDI suppression Vehicle. Triple mounting and long-range cannon makes GDI forces have a powerful protect from Nod Artillery.
MCV
Deploy it to own a Construction Yard.
Orca Fighter
GDI high speed support aircraft. Two AP ammo can kill most of vehicles,
Orca Bomber
Bomber using large acreage damage warhead, effective against nearly all of ground forces.
Firehawk
Bomber using point damage warhead with EMP effect, effective against nearly all of ground forces.