There are two ways of verifying your gladiator badges.
The first is to manually type /settitle #
for each gladiator badge you have, where # is the value in the far left column of this gladiator badge list
. Note that if you do not have a specific gladiator badge, you will see an error of "Your badge title has been cleared."
Alternately you can download the SetTitle Binds
specifically for the gladiator badges subset (only tick the box beside Gladiator) and follow the instructions on how to run the binds in-game.
Glycerin or HeroStats should, of course, be running in the background when you do this.
Either method will work... it simply depends on how many gladiator badges you need to verify and how much patience you have. (I used the first option when I started tracking my badges on CIT, but used the binds generator with the recent re-upload.)
-- Lady T