Glads can't really do anything to Juggs, and if Glads fights smart, Juggs can't really do anything to him either.
If Glads takes the fight h2h, then he'd lose eventually. It'd take a fair while but Juggs would win in the end. That's only if Glads fights stupidly though.
Glads could toss Juggs into space or something, but as we know, that wouldn't stop him. He'd eventually be back.
He has just about all of Supermans strengths but different weakness. He is weak to unknown form of radiation.
"Superhuman physical powers: Aside from the above listed attributes, Gladiator has the ability to project intense heat from eyes and the ability to survive without breathing for an unrevealed period of time
Superhuman Mental Powers: None. (Gladiator's powers were formerly theorized to be at least in part psionically based)
Special Limitations: Vulnerability to an unknown form of radiation"
Check out the Gladiator Respect Thread to find out more about Glads.