Why is "import gym" grayed out in pyCharm and I can´t import it?

I´m trying to run some basic Pytorch gym code (Lunar Lander) in Pycharm, using a Mac. In the tutorial I see "import gym" as the first line. However, when I type this on Pycharm it grays out. I tried pip install gym and pip install --upgrade pip just in case. I tried to use Jupyter but it didn´t work for gym modules.