The G650 already flies almost anywhere anyone charters to. What the G700 adds is roughly ten more feet of cabin, and that changes the way a long flight is used rather than where it can go. Five zones means a club four at the front, a conference or dining area, a lounge, a proper galley and a rear stateroom with its own shower, all at once, without anybody's meeting happening over somebody else's sleep.
The other number to look at is the cabin altitude: about 2,840 feet at 41,000 feet, which is unusually low. On a thirteen hour sector that is the difference between landing in Singapore ready to work and landing wanting a dark room. The windows are the largest Gulfstream fits, and on a night crossing the cabin lighting system is set to the destination rather than the departure, which sounds like marketing until you have done it.
G700s are arranged with licensed commercial operators. It is a new type, there are not many in European charter fleets, and availability on a given date is the real constraint. We will tell you plainly whether one can be had for your trip or whether the honest answer is a G650, a Global 7500 or a Falcon 8X.