If you want to use the gpios, you would have to send the console output on another port, you could use ttyMDF1 which is the UART1 (Digital pin 0 and 1). The Intel Edison to send the console in the port ttyMDF2 by using the services getty@.service, console-getty.service and serial-getty@.service, all of them are located in /lib/systemd/system. I suggest you to check them out to have a better understanding on how they work as well as this post, but you have to be careful with those services because you can get without access to console. I also found this guide to use a serial port as a console that might interest you. I hope this helps.