To tame this you got to get the Baby and follow These steps:

1. Take a Giga or Carcha Egg with you

2. Find a Giganto Nest

3. Drop the egg you have a Bit far away from the nest. The giganto will See and eat it

4. Hurry and sneak into the Nest, wait for Baby to join in

5. Press the correct button(s) and soon it is tamed

6. Pod it and thats it

More Gigantoraptor Taming & KO Tips