Dubai to Geneva is roughly 2,700 nautical miles and a comfortable non-stop for a heavy jet, at around six and a half hours. It is a heavy or ultra-long-range leg; midsize aircraft cannot make it without a fuel stop, which on this route is never worth taking.
Private jet charter from Dubai to Geneva starts from $47,500 on the smallest suitable aircraft. That is an indicative starting price, not a quote: the figure for your trip depends on which aircraft are available, where they are positioned and the date you fly.