Oh so you want to kill it. It’s one of the most powerful wild creatures in ark. It has tons of health, hits like a MONSTER TRUCK, and easily murders everything. Oh how do you kill it then? Easy. Just lead it into water. Gigas can’t swim so it’ll just drown
If one is encountered near water, you can simply lure it out to sea with a flyer and it will swiftly drown. Given the water is deep enough. If encountered inland not near water. Pray to the overseers you have something fast enough to out run it. Then promptly die because they're as fast as a mad Hispanic mother with a shoe. Not as deadly as one though.