root@retropie:/home/pi# dpkg -l | grep gpiozero
ii  python-gpiozero                      1.4.0                                      all          Simple API for controlling devices attached to a Pi's GPIO pins.
ii  python3-gpiozero                     1.4.0                                      all          Simple API for controlling devices attached to a Pi's GPIO pins.
root@retropie:/home/pi#