Um...Clueless in Montreal!

SUBSYSTEM=="subsystem", KERNEL=="gpio", ACTION=="add", \
        RUN+="/bin/mkdir -p /dev/gpio"

SUBSYSTEM=="gpio", ACTION=="add", TEST=="value", ATTR{label}!="sysfs", \
        RUN+="/bin/ln -sT '/sys/class/gpio/%k' /dev/gpio/%s{label}"

#
# ReWritten by: Matthijs van Duin and fiddled with by Seth
# Corrects sys GPIO permissions on the BB so non-root users in the gpio group can manipulate bits
#
SUBSYSTEM=="gpio", ACTION=="add", \
        RUN+="/bin/chgrp -R gpio '/sys%p'", \
        RUN+="/bin/chmod -R g=u '/sys%p'"

SUBSYSTEM=="subsystem", KERNEL=="gpio", ACTION=="add", \
        RUN+="/bin/chgrp gpio '/dev/gpio/'", \
        RUN+="/bin/chmod g=u '/dev/gpio/'"