If you are going to tame this thing then you need

1. A flyer, bigger the better

2. 10 stacks of ammo

3. High quality crossbows or rifles

4. 3-5 Metal gateways(it can destroy stone)

5. Large bear trap

6. Food, kibbles if you can

7. 1000 Narcotics or bio toxin

Step 1. Find giga(usually on mountains)

Step 2. Land with a decent distance

Step 3. Put 2 gateways in a v shape and bear trap in the middle

Step 4. Let it go agro on you and make it go to the trap

Step 5. Place the last gateway to form a triangle around the giga

Step 6. Shoot constantly through gateway

Step 7. KO it and feed food and soothing balm if you have one

Step 8. DO NOT go away, it will wake up any minute, and feed narcotic or toxin occasionally

Step 9. Realise that a tamed giga is MUCH weaker than a wild one