The G500 is close to completing function and reliability testing, while the G600 is well into its certification program.
So far, the fourth G500 flight-test aircraft has completed 240 of the 300 hours of mandatory F&R testing. It has flown more than 100,300 nm during 69 flights to 41 airports in 21 countries on six continents. F&R testing is expected to finish this summer.