Gorilla, 65 million years
The primates that include gorillas have been on Earth for 65 million years, but it took a few million years for the ancestors to evolve into the gorillas we know today. As of right now, there are 500 species of primates and maybe even more.
You are right Amos, everything was created in 7 days by a magic man in the sky.
Carbon dating is not relevant here since it only can date thing that are 50000 years or younger. There are other methods for older things. The theory of evolution makes sense and can explain a lot of the observations that have been done by scientists.