Changing Default GPIO Output

While booting, most of the expansion pins on BeagleBoard-xM are logic
high (ie. 1.8V). Is it possible to change this behaviour? I am trying
to enable/disable a logic IC programatically and I want it to be
disabled by default. I tried inverting outputs, this time the IC is
enabled when the BB is off. Is it possible to set low an output (say
GPIO_144=PWM 9) when the BB is power on?