How do I start GPM?

[Bruno Wolff III]

On Wed, Oct 14, 2015 at 15:17:45 +0100,
  Jonathan Allen <jonathan at barumtrading.co.uk> wrote:
>Dear List,
>
>How can I start 'gpm' on a F22 laptop?  I've installed the GPM package,
>but it doesn't seem to want to start ...

Normally you set it to run at boot by running the following as root:
systemctl enable gpm

To start it if it isn't running you do:
systemctl start gpm