Geneva to Gruyeres? Train and ?

There are departures from Geneva on the hour. They all take very close to 2 hours, and they all involve train-bus-S-Bahn. I don't know exactly what the S-Bahn is--tram? local train?

This webpage lists several ways for getting up the hill: https://wikitravel.org/en/Gruyeres. There might also be a taxi waiting at the station.

It's less than a mile uphill. There's a regular bus or plump for a taxi.

I did Gruyeres from Bern many years ago, it's a nice little place. The castle is worth a visit, so is Fribourg close by if you have the time.

If you do decide to walk up to Gruyeres, don't follow the road up to the top. It takes a very windy path up. Instead take the easy hiking path up, it's a more direct route; you will see the trail sign across from the train station.

We did this last year from Geneva. It’s a nice little day trip. Personally I would not want to spend more than a few hours there. I know there are hotels there, but what do you do there for more than a few hours?

acraven, S-Bahn is the name in German speaking areas for a frequent regular interval city and commuter railway. It often goes through the centre and out the other side again.
S-Bahn = Stadtschnellbahn = Urban Express Railway.
Lines are usually numbered, S1, S2 etc.

In Paris and other French-speaking cities this is called "RER" (= Réseau Express Régional = Regional Express Network)
There is not really a common English generic term for this. In London, the north-south Thameslink route, and the hopefully-soon-to-be-opened East-West Crossrail are S-Bahn/RER.

Thank you. I've used the S-Bahn in Berlin but still didn't know exactly what to call it.

We were in Guryeres last August for 3 nights and only used public transportation. There's a bus stop at the train station, the schedule closely coordinates with trains arriving at the station. We didn't have a problem bringing our luggage on board. We could've walked up the hill (we travel lite) but it was raining when we arrived. Have a great trip, we loved our time there!

As for all public transport in Switzerland you can see exact schedules of all forms of transport at www.sbb.ch/en