GQ can't seem to deal with the poison very well.
To explain what's going on, every three turns in an arena battle, the effect "Arena Penalty" happens. Depending on the battle, everyone gets hit with a specific status ailment/benefit. In this particular match up, everything gets poisoned.
This highlight covers both his fail and his win. Enjoy the Cautious Travel Arm Force, GQ. You earned it. (...seriously, get Niko some WP and get that Arm Force off the weapon you won. :P)