what is the status of gate drive output(pin8) when VCC(pin 7) off or loss?

I do not know how to insert the picture. I am using UCC28019A(from TI) PFC.

 

TI's product folder for the UCC28019A is here: http://focus.ti.com/docs/prod/folders/print/ucc28019a.html
Datasheet: http://focus.ti.com/lit/ds/symlink/ucc28019a.pdf
My best guess would be that the gate would be low.
However, you could pose the question to TI on their forums:
http://e2e.ti.com/support/power_management/isolated_controllers/f/188.aspx