Happy Day, there is updated firmware for your GB3 single extruder, dual extruder and XL sized printers.
You can find the firmware on the Wiki here: http://wiki.re3d.org/index.php?title=Firmware_installation
Release notes are here: http://wiki.re3d.org/index.php?title=Gigabot_revision_history
Please also leave comments here about any new firmware features you would like to see.
Happy Printing.