Hello kloneman
I assume you are travelling on Swiss trains using a Swiss Travel Pass, there is no 6 days GA Travel Card.
On Swiss trains, there is usually free seating.
Swiss trains are a form of mass transit, similar to suburban trains in other countries. As a result, you are welcome to take any vacant seat in your respective travel class. If you want to sit next to someone you don’t know, it’s courteous to ask if the seat is available before sitting down.
Should you reserve a seat? Except for certain panoramic trains (PE), seat reservations on Swiss trains are completely optional. Swiss people usually make seat reservations when they would like to eat in the dining car, when they travel as a group of 10 or more, or when many travelers are expected.
→ If you still want to reserve your seat, kindly note that this is possible for IC, ICE, EC, RJX, TGV, and selected IR connections only.
Kind regards,
Roland