@Mando what hardware do you use? Please post what is returned for those command, after you have rebooted the PI.
cat /etc/group
cat /etc/passwd
ls -la /sys/class/gpio/export
ls -la /sys/class/gpio
ls -l /dev/gpiomem
Maybe try to compare to
Also post the content of one of your scripts. Do you have the shebang? Then you would not need the /opt/bin/python2 i think. Maybe this thread helps! So did you install the files to the folder python2.7 as described there?