Good evening @Ghoawukoz50
Thank you for your request. I’m delighted that you’re coming to Zermatt.
You and your wife have a Half-Fare travelcard and will pay 50% of the ticket price.
Your daughter’s family card is not valid on the Gornergrad Railway, so she must also have a 50% off ticket.
The Gornegrad Railway is a private company. You may write them by following this link: https://www.gornergrat.ch/en/service-providers/service-center
I hope you will have a wonderful stay in Zermatt.
Kind regards, AntoinetteS