Status of GPIO pins while sleeping

[AJTozer]

What is the electrical state of the GPIO pins when the module is sleeping? Are they high-Z or ground?

I have an external component that I want to put into its sleep mode by pulling it's *SLEEP input to ground. If I use digitalWrite to set a pin low and then put the Z-Uno module to sleep what happens to that output pin?

[PoltoS]

As I remember, they remain same as before sleep mode. So make sure not to drain the battery!