Open "Settings" on your GMail Calendar as shown in the accompanying image.
Alternatively, you can just give viewing rights to a specific person by adding their email address in the "Share with specific people" area.
If you want folks to see exactly what you are doing, you would select "Show details" when you create your shared setting.
So...I've got to give a big shout out to Sinead, without whose help, I would have continued to flounder in the abyss that is "The Internets". Google support is running a VERY CLOSE SECOND to Apple Tech Support, simply the best in the world.