Once you have set up paid memberships on your Ghost site, you may want to gift friends, family or clients access to your premium content.
This is very easy to do in Ghost.
In your Ghost admin, each paid subscriber will have a toggle on their profile page, called "Complimentary premium plan".
If you turn this on, your subscriber will have access to your paid plan, for free.
Note: this feature is only available once you have set up Stripe and your paid plans within Ghost.