DRV8871: design with DRV8871 and INA199

Part Number:DRV8871

We design full bridge with DRV8871 to drive brush motor; And we need INA199 to enlarge the voltage to get the current；

And question is how to handle the all connection of GND? Such as MCU(GND) and DRV8871(GND)and INA199(GND)