Avionics
Gulfstream PlaneViewTM II Avionics System
Triple (3) Flight Management Systems (FMS)
Enhanced NAV (FANS-1A+, CPDLC)
Triple (3) Modular Avionics Units (MAUs)
Four (4) Large Flat Panel LCD Electronic Display Units (Pilot PFD-MFD & Copilot PFD-MFD)
Dual (2) Standby Multifunction Controllers (SMC)
Triple (3) Multi-Function Control Display Units (MCDU)
Dual (2) Cursor Control Devices (CCD)
Four (4) Multifunction Air Data Probes (MFP) Air Data System
Triple (3) Inertial Reference Systems (IRS)
Dual (2) Global Positioning Systems (GPS) w/ Wide Area Augmentation System (WAAS)

Datalink VDL Mode 2
Synthetic Vision - Primary Flight Display (SV-PFD)
Head-Up Display (HUD)
Enhanced Vision System II (EVS)
One (1) Data Loading LAN Management Unit (DLMU)
Dual (2) High Frequency (HF) Communications
Dual (2) Very High Frequency (VHF) Communications
One (1) VHF Communication / Navigation (NAVCOM) Unit
VHF Navigation, Instrument Landing System (ILS), and Market Beacon
Dual (2) Mode S Transponders w/ ADS-B Out Capabilities (DO-260B Compliant)
Traffic & Collision Avoidance System (TCAS 7.1)

Dual (2) Distance Measuring Equipment (DME) Transceivers
Satellite Communications System (SATCOM)
Enhanced Ground Proximity Warning Systems (EGPWS)
Flight Data Recorder System (FDR) - Twenty-Five (25) Hour Recording (88 Parameters)
Cockpit Voice Recorder (CVR)
3-D Color Weather Radar
Dual (2) Digital Radio Altimeters
Automatic Flight Guidance System
Autothrottle System
Central Maintenance Computer (CMC)
Emergency Locator Transmitter (ELT)
Pilot & Copilot Emergency Vision Assurance Systems (EVAS)
Automated Direction Finder (ADF)

Original source:
https://www.hangar67.com/aircraft/2013-gulfstream-g650er/26495