Have you tried this?
# Make sure Gear is powered off.
# Press and hold the power key until you see either the '''Galaxy Gear rebooting'''… .
# Release the power key and then repeatedly press the power key until you see the '''Reboot Select Mode''' screen.
# Press the power key to highlight the "'''recovery'''" option.
# Long press the power key (5-8 sec.) to select it. The device will reset and return to the factory initialization screen."