You don't need gateways if you don't want to waste lvl, you can use 8 metal fence or 4 metal foundations and 24 metal walls, leave spaces of about 2 steps between each other, also place a few traps in different places nearby your escape position. And when you shooting hower above the ground, raptors may want to help for giga :)

Use smooth balm, it's not hard to get it from the lava cave

Best way to tame a giga (maybe) Make a trap looking like this with 4-5 metal METAL gateways. Put a bear trap in the middle, and bring a quetz with 10k+ health. Lead the giga to trap, while you probably will be bitten by giga. Wait until it gets stuck in bear trap, and if I didn’t mention BRING AN EQUUS TO RUN AROUND IT. But get on ur equus, and make sure it can’t hit you, but put a gate or 2 behind it. Then knock it out with mastercraft or ascendant crossbow or longneck, or compound bow with toxicant arrows. Then, bring 10x balm and quetz kibble 1-30 and simply tame. I hope you tame that giga you wanted! And I hope this would be helpful.

If you find a low level giga and if you have a friend or two you can build a 4x4 stone box that is 3 walls high (use door frames for shooting it) and a ramp up one side (credits to Tecorsuh on YouTube for the trap idea) you and your friend(s) can use crossbows with tranquilizer arrows to knock it out. I’d recommend each person taking one primitive crossbow with 100 tranquilizer arrows. After the giga is knocked out (do make sure you have plenty of narcotics as the giga’s torpor drops at an alarming rate) just give it raw prime meat or regular raw meat. If you followed this little guide here, enjoy your friend the giga!

Another way to do this:you are on a side of a mountain and you have large bear traps. Go to the bottom and place them all down scattered. Shot the giga and runs right at you and goes in the trap. Then you need boi toxic tranqs (about 200 just in case) and any type of long neck rifles

I laugh at you people that waste your time using narcotics when this beast losses so much torpor, so fast that only the duration of the torpidity rising is what is going to stop the torpidity from falling. In short you could just use 3,000 narcoberries (probably all you need) and keep his torpor rising for 2 hours and don’t have to give a care for the Giga during that time. He looses like 100 torpor per second, so brewing the narcotics is only effective when the creature unconscious loses torpor slower than other Dinos and you need to bring up its torpor a crazy amount. Do what I do and use even just a parasaur to harvest a bunch of berrie. P.S. love parasaurs for life :)

Make a metal trap out of double doorways and a metal behemoth. Put 9 bear traps inside and 3plant x's just outside the back of the trap. lure her in with a tapejara. (They agro her to no end) be aware she can still almost escape this. Our level 140 took 80 tranq darts to the face from our journeyman long neck riffles. And the prime meat from 2 long necks. Be cautioned it spawned another giga in the same area immediately after we tamed her. We named her shiela.

18 metal Dino gates (not behemoth) 8 large bear traps. Create almost like a pear shape with Dino gates allowing 2 gates to block off end he will enter. Place 1 trap right in entrance than 3 further back than 4 about at end. Recommend having a tribe mate as well, than once placed carry mate with bird while he shoots giga. The giga will follow while killing everything in its path so I can take a few more minutes than expected cause he like to eat!!! Keep far enough away from ground to not allow mate to be eaten or yourself too, than lure him back to trap and once he steps on first trap in your gates drop your mate at end so giga will chase him farther into trap. Than wait for it to step on 2nd line of bear traps than run up while giga is stuck in trap and place last 2 Dino gates at end to block it off completely!! At that point i suggest jump on bird fly up a lil and breath for a minute because now the next task begins but mostly importantly congratulate yourself on the success!!