At the command line:

$ pip install gio

Or, if you use Conda environments:

$ conda create -n gio python=3.9
$ conda activate gio
$ pip install gio

Installing scikit-learn allows you to access some extra options for outlier detection:

pip install gio[sklearn]

For developers, there are also options for installing tests, docs and dev dependencies.

If you want to help develop gio, please read Development.