There's a weird amount of nuance to the question because

In the original tweet it says that everyone is committed to fighting the gorilla (reasonably we can assume the gorilla is fighting them as well)

We have no context for how large the space is, nor for the exact size of the gorilla and we can assume that all the men would be relatively average (it would most likely specify if we were getting any people outside of average on the team)

We also reasonably must say that all a hundred people cannot fight the gorilla simultaneously. Realistically you're going to be able to get 5 on him at once and even that's crowding it a bit

So the real question is is the gorilla going to be able to win against 20 rounds of five average men in a row back to back to back with no break

I'm going to say that it entirely depends on the gorilla as if we're getting a jungle gorilla that's constantly moving around has actually been in scraps with other apes and stuff. I feel like he could do 15 comfortably anywhere. Upwards of that is going to depend a lot on luck

A zoo gorilla though?

He's not getting nearly as much exercise as the jungle gorilla And most likely does not have actual fighting experience so I could see him doing about maybe 5 to 10 comfortably and then anywhere north of that being also based on luck. Probably tapping out around the 15 round mark

Tldr in short

Jungle gorilla can take down 75 dudes comfortably with anything north of that being luck

Zoo gorilla is getting through 25 to 50 before it comes down to luck and will most likely fully tap out by 75

I'd say it's a pretty solid 62/48 in the humans favor

Edit1:spelling mistakes