Gyrocopter is a ranged agility hero that is most commonly played in the carry role.
His high early burst magic damage output and teamfight ultimate allows him to get involved in early engagements whilst his Flak Cannon ability can make him a late game monster in teamfights providing he has sufficient farm.
Skills
Rocket Barrage is skilled and maxed first.
Homing Missile is skilled second but thereafter not skilled again (it is the worst stun in the game; even stats are a better investment).
Flak Cannon is skilled last but maxed second.
Call Down is always skilled (levels 6, 11 and 16).
Items
Starting Items: Tangos, Healing Salve, 3x Iron Branches, Gauntlets of Strength.
Early Game: Power Treads (survivability, attack speed) or Phase Boots (early damage, chasing potential), Magic Wand, Bracer.
Core Items: Drums of Endurance, Black King Bar.
Luxury Items: Monkey King Bar, Butterfly, Satanic, Divine Rapier, Daedalus.
Situational Items: Hand of Midas, Ring of Aquila, Boots of Travel.