The GH4 is largely physically similar to its predecessor, the Panasonic Lumix DMC-GH3, adding only a locking mode dial and more detailed rear LCD screen and Electronic Viewfinder.

The camera also has Wi-Fi with NFC, PC sync port, highlight and shadow control, and a 'silent mode' which uses the electronic shutter only.

Video features added to the DMC-GH4 include Focus peaking, zebra overlay, luminance level adjustment, and cinema gamma presets.

Along with the GH4, Panasonic also released the YAGH interface unit, a camera-attached device to increase input and output options for the GH4.

For outputs, the YAGH offers four BNC connector terminals for serial digital interface use with outboard recorders and monitors.