Linux: GPIO access issue

my terminal op
GPIOs 0-31, platform/44e07000.gpio, gpio:
gpio-4 (sysfs ) in hi
gpio-5 (sysfs ) in hi
gpio-6 (cd ) in hi IRQ
gpio-7 (sysfs ) in lo
gpio-20 (sysfs ) in lo
gpio-23 (sysfs ) out lo
gpio-26 (sysfs ) out lo
gpio-27 (sysfs ) out lo
gpio-30 (sysfs ) in hi
gpio-31 (sysfs ) in hi

GPIOs 32-63, platform/4804c000.gpio, gpio:
gpio-44 (sysfs ) out lo
gpio-45 (sysfs ) out lo
gpio-46 (sysfs ) out hi
gpio-47 (sysfs ) out lo
gpio-48 (sysfs ) in hi
gpio-53 (? ) out lo
gpio-54 (? ) out lo
gpio-55 (? ) out lo
gpio-56 (? ) out lo
gpio-59 (clk_mcasp0 ) out lo
gpio-60 (sysfs ) in hi
gpio-61 (sysfs ) in hi

GPIOs 64-95, platform/481ac000.gpio, gpio:
gpio-65 (sysfs ) out lo
gpio-66 (sysfs ) out lo
gpio-67 (sysfs ) out hi
gpio-68 (sysfs ) out lo
gpio-69 (sysfs ) out hi

GPIOs 96-127, platform/481ae000.gpio, gpio:
gpio-112 (sysfs ) in lo
root@beaglebone:~#

i am not using GPIO 115 117 how can i use that ?

What Linux version is this?

root@beaglebone:~# cat /etc/dogtag
BeagleBoard.org Debian Image 2016-01-24
root@beaglebone:~#

i Am able to control and read the PINS 66 67 68 69 like that but NOT 115 117 49 20 any advice how can control that

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