Gulfstream V / G500 / G550
Flight Crew Air Transport Pilot (ATP)
Distraction; Confusion; Communication Breakdown; Situational Awareness
Ground Event / Encounter Other / Unknown; Ground Excursion Taxiway
General None Reported / Taken
Human Factors; Airport
Landed Runway XX ZZZ; I was the PIC in the left seat. As we taxied off the runway; Ground Control told us to enter ramp. A Lineman stood on the ramp and directed us to enter at taxiway. As I was making the 90 degrees turn to the right; I saw that a Global 6000 was parked on the ramp in front of us. Not wanting to go wing tip to wing tip; both myself and the pilot in the right seat thought we had enough room to turn the additional 90 degrees to the right; and proceed the 100 yards to the waiting lineman. As we rounded the turn; the aircraft came to a stop on its own. Thinking we were clear; but not knowing why we stopped; I shut down the engines and exited the aircraft with the passengers. Passengers got in their car and departed. I then saw that the plane's right main wheel went off the corner of the taxiway and ramp by 2 feet into the dirt.
Upon taxi in at ZZZ was directed to taxi. Line personnel directed us to parking. I was in the right seat and no obstacles were present on right side of aircraft. The PIC and I both observed an aircraft on the left of our aircraft that was too close to get by without a taxi director. We had a Director on the left side but she was not watching our aircraft; but another aircraft taxing out. The PIC turned to enter the ramp and the right main went off the pavement into the dirt. PIC stopped aircraft and shutdown the engines. He informed the passenger; called the Company and coordinated the situation. Have more skilled taxi directors when ramp parking is congested. If a competent taxi director had been available and on site; this would have not happened.
G550 flight crew reported a taxiway excursion during taxi in.