Hi Arno -
<<"That means it assumes a 55 minute transfer time from one station to the other without suggesting the mode of transport. The metro is the defaultway to get around. I guess a taxi may work as well.">>
I reviewed some old conversations (had in 2013 and 2014) in a General Travel forum to which I belong about connecting from CDG to various train stations in Paris. Mostly focused on "Nord" and "Est"...not Gare de Lyon. I hope they are not relevant. ;-)
A member of that forum who lives in Paris offered extensive comments about time and expense for various station-to-station connections in Paris. Complex and difficult with luggage.
I cannot relate them specifically to the journey being discussed here, nor do I know how best to get more information. With luck, the proposed journey ( CDG to Geneva ) can avoid complications in Paris
Some selected quotes -
<<"The Gares du Nord and de l'Est are actually very closetogether and (theoretically, at least) are a walkable distance apart. Whatmakes that kind of a no-go with luggage is that part of that walk includes along flight of steps.">>
<<"I concur that you probably want to avoid the RER option. Taking luggage on the RER isn't the best option, especially if you'll have a lot of luggage,.....">>.<<"Taxi is an expensive option. Figure on 50€, though if traffic isn't too bad, you could get lucky. Time can be anywhere from about half an hour to an hour or more, depending on traffic, weather, strikes, etc. But you can't beat it for direct service and someone to handle your bags.">>
That related to CDG to Gare de l'Est.
I really don't understand what all that means, or how it relates to Annemansura's journey, but I suggest that Annemansura (or someone) might spend some time figuring out the various ways to get from CDG to Paris Gare-de-Lyon. I hope it is easy, and that I am making a mountain out of a mole hill. I'm just saying what I would do , personally. Perhaps you know how to do that?
One of the things that makes travel in Switzerland a delight is how well the train (or bus at Basel) connections work from the airports. Even in Zürich, with many legacy peripheral stations, it is easy. A great deal of thought and effort has gone into connecting all the parts of the Swiss rail network.
One of the few remaining gaps in the Swiss network(in Geneva, from intra Swiss and some French trains to Lyon and Paris at Station Cornavin) onward to the station for trains southwards to south eastern France ( Station Lancy ??) is now being filled...freight traffic has been possible; a passenger train connection will be available in the future.)