Once you find the lvl you want ( go as low as possible if it's your first ever gigs tame) get supplies and I mean supplies! You can never have enough when taming a giga so get together at LEAST 1000 narcotic a few hundred tranq darts and arrows for backup as well as any food source u want to use. Then make a large trap an a few metal Dino gates to make a trap lure it into the trap and surround it with the gates to keep it stuck....then KO it and go through the normal process of taming an animal once you have finished enjoy your new "pet"
I dare you to raise one!! They are savage if you got two high lvl parents (about lvl 140ish) and you get imprinting on it. The thing will become an adult with about 230% melee and basically one chomp any bronto!!! But on the down side you loose your job and your girlfriend
Make 4 metal dino gates and 1 large bear trap. Place three frames and door into an incomplete square and the large bear trap in the I between them. Lure the Giga into the trap and while its trapped place 4th down to make the square. Then just light it up with tranqs