that depends on they type of monkey, and the species. If there where a group of a few dozen mandrils, then sorry, the gorilla would not stand a chance. If it where an individual, or maybe even a few of them, then the gorilla would win.
A rhino could flip a gorilla
A gorilla has no chance to fight a rhino.
a silver back gorilla would win easily win!
A monkey!
Probably the gorilla, as cougars do not like to fight an animal that will stand up to it and be prepared to fight it.
The gorilla would win on land. It can break the crocodile's jaw or shut it tight. In water, the crocodile would bite the gorilla and drag it underwater.
Elephant .
a bear
The black bear would win.
gorilla
Well, the monkey would drown before the fight got too far.
* if a gorilla ever got into a fight with a pack of bamboons, most likely the bamboons would, but it is more of a 50% 50% chance in the fight