You may take the train to Geneva, Cornavin and then the bus.
www.cff.ch
To come with the public transports (TPG):
Take tram 13 or 15, direction Nations and get out at the last stop.
Take bus number 8 and get out at UIT
Take bus number 5 and get out at Varembé
From there take the map http://www.ville-ge.ch/geneve/plan-pietons/pages/temps/carte_temps.html or your iPhone to find the CICG. CCV, Varembé is just the building next to the CICG.
If you take the car, there is a public park but it will cost a fortune.
The TGV will take you to Cornavin, the main station but you can also come by plane if you come from Paris (click here to see a timetable of flights from Paris to Switzerland).
www.voyages-sncf.com
www.aeroportsdeparis.fr/
We have a great airport in Geneva so you should easily find reasonably priced tickets from Easyjet, Swiss, Air France, British Airways, Fly Baboo or any other airline.
www.gva.ch
www.easyjet.com
www.swiss.com
www.airfrance.com
www.britishairways.com
www.flybaboo.com
Online travel agencies will also provide an overview of the available flights: eBookers, STA, Carlson Wagonlit and all the others.
www.ebookers.com
www.statravel.ch
www.cwtholidays.ch