Taming these guys is a pain, since they stay asleep for 10 secs. But the idea to keep these guys asleep is by bringing bio toxin. Since it has a lot of torpor when consumed,. But what sucks about biotoxin is that it spoils.
Gallimimus are an annoying tame.They can be trapped with a bola, but due their low health, it is difficult to knock them out with tranq arrows without killing them, I recommend taking tranq darts instead which are unlocked around level 60. These work better as the deal more torpor, but much less damage, meaning you can knock them out without killing them now. The saddle also has 3 seats, which can be great if on multiplayer. Thanks for reading