GPIO default state can be configured by /boot/config.txt as described on official raspberrypi site.
As described there you can add lines with following syntax:
gpio=<pin>=<mode>,<state>
Section | Values | Description |
---|---|---|
pin | 9 / 7-9 | Pinnumber or range to configure |
mode | ip / op | Input / Output |
state | dh / dl | For Output → Drive High/Low |
state | pu / pd | Pull Up/Down |