Forum:Xyz and Gigastone Omega

If i use "Gigastone Omega" and another level 5 monster for Xyz summon "Adreus, Keeper of Armageddon" and detach "Gigastone Omega" for active "Adreus", can "Gigastone Omega" active its effect and destroy all Spell and Trap Cards my opponent controls?

Resume: Detach is an effect?