Alright get ready for a fighter here.

1: Get a lot of shocking tranqs, ofc with the longneck rifle

2: Have a nice flier just incase, preferably an argie

3: Build a trap for the giga or camp a mountain.

4: Make sure you have kibble/prime meat to tame it

5: Shoot it till knocked out

6: Feed it prime/kibble

7: Enjoy! Hope this helped 😊