What is needed for the usage of a Motorola GM360 transceiver

• Motorola GM360 UHF
• Raspberry Pi (no matter what model, How-To is based on a RPi 3B+)
• An original Motorola accessory connector. Alternatively a 20 or 16 pin Dupont connector
• A 3.5mm stereo jack plug
• A 22 uF capacitor
• A generic NPN transistor (i.e. BC547)
• A 470 ohm resistor

• Motorola pin 3 is the PTT wire (pulled to GND in case of transmission)
• Motorola pin 5 is the audio signal
• Motorola pin 7 is GND

• Alsamixer, audio volume 100
• Unipager audio level 42
• Unipager 'Inverted' checked
• Unipager TX delay 15

Thanks to Lutz dh7lk for this contribution