
A Gulfstream is as well known for dependability as for luxury. Historically, the aircraft demonstrate a dispatch reliability percentage over 97% which means that when you are ready to go, so is your aircraft.
The capability and reliability of the Rolls-Royce Spey engine is legendary.

With the exception of foreign object ingestion, there is almost no chance of an internal engine failure. Such reliability means that your operation should not be impaired by unexpected engine maintenance.
The airframe is as rugged as the engines and with continuing maintenance can fly almost indefinitely. In addition to the manufacturer, several companies around the world provide quality maintenance and refurbishment services for the Gulfstream II and III series aircraft. Since it is a large cabin jet, upgrades to newer equipment are often easier because of space availability. This is especially true with avionics upgrades since the Gulfstream has a large, easily accessible avionics rack and additional space can be found throughout the cabin and baggage area if necessary.