First, make sure your Portage tree is up-to-date by running:

   sudo emerge --sync

You can install `zoxide` using the following command:

   sudo emerge --ask app-shells/zoxide

After the installation is complete, you can verify that `zoxide` has been installed by running:

   zoxide --version

To make `zoxide` available in your current shell session, you may need to add it to your shell's configuration file (e.g., `.bashrc`, `.zshrc`, etc.). For example, if you are using Bash, you can add the following line to your `.bashrc`:

   eval "$(zoxide init bash)"

If you are using Zsh, you would use:

   eval "$(zoxide init zsh)"

After updating your shell configuration file, reload it by running:

   source ~/.bashrc  # or source ~/.zshrc for Zsh

That's it! You have successfully installed `zoxide` on your Gentoo system and configured it to work with your current shell.