[33girl]

Underground GLOs are not recognized by the school OR their nationals. They are basically outlaws in every sense of the word.

Unrecognized GLOs are simply not recognized by the school, can't meet on school property, post bulletins in school buildings etc. For whatever reason (and it's often pretty lame) the school won't recognize that they exist, but they are totally in good standing with their national group. There are also unrecognized local GLOs that haven't done anything wrong, the school may just not want to acknowledge they exist.

The two terms are NOT interchangeable.