The gy-521 module is usally interfaced with via TWI/I2C. The actual chip that is used in the module is the mpu6050 ic. This driver doesn't make any assumptions about the platform it will run on beyond ...

# Using the Serial Interface (App when completed), We'll send data to the drone, either to start or move the drone. # Our Wireless reciever will Recieve the command, and report back a response to us. ...