If you have a spare micro usb data cable, you can strip it for use with the Game Boy Controller v2.1. Some cables have different colors for the 5v, GND, D+, and D- wires so you may need a multimeter to verify the connections.
Here’s how you wire it to the Pi Zero
To wire the Game Boy Controller v2.1 to the Raspberry Pi Zero, you will need to connect the appropriate wires from the micro USB data cable to the GPIO pins on the Pi Zero.