The Jungle Gorilla has three stages of growth - baby, adolescent, and adult. It takes roughly 15 hours for a Jungle Gorilla baby to grow into an adolescent Jungle Gorilla when following the player, though this can be sped up by interacting with the pet. Stages can be skipped by using a Growth Surge on the pet, e.g. baby to adolescent or adolescent to adult.
It takes an additional 25 hours to reach the adult stage. This time can be halved by interacting with the pet through the use of its emote. It appears that while the pet is with the player, it generates its own pet points up to a cap of 30 points. When this cap is reached, simply making the pet do an emote will allow the player to retrieve the generated points, making it possible to raise the pet in half the time.
A Jungle Gorilla does not need to be fed like a normal pet. Although feeding it Tasty Treats will increase the rate at which it grows by 50%, and feeding it Jelly Treats will increase it by 100%.
Like all pets and summoning familiars, it cannot enter or use its abilities in some areas of RuneScape.