Hello rootbooster, welcome to AF!
What carrier do you plan to use the phone with? The reason I ask is because verizon is a CDMA network and most others use GSM... especially internationally.
Here are the forums for that device... but from a quick look around, it looks like maybe there isn't a root yet for that one...?
http://androidforums.com/casio-g-zone-commando/
http://androidforums.com/commando-all-things-root/
If there is a root, they'll be able to help you. I'm not entirely sure they'll be able to help you switch carriers, as that's often tricky business.
-9to5