I've been playing Ark since 2017 on console. The easiest way to trap a giga is with 4 metal billboards and a large bear trap. You place 3 then the bear trap, then lure it in. You have to be quick because the bear trap only lasts a couple seconds. Place the last behind and start tranqing. It's a giga so use dododex to see how many tranqs you will need. You will also need a TON of narcotics. Only take high lvl males and any lvl female, because the baby is more likely to inherit the Male stats. Last but not least do not think you can take on anything with a giga. All it takes is an alpha carno to get stuck underneath you and you hard work is down the drain. Wild gigas spawn with 80k health but when you take one it goes down so you cant kill gigas with gigas.