Gladiator has shown before breaking thru quasar's constructs. Given that GL's are powered by willpower and need it and concentration to maintain their force. That is asking alot against Gladiator who has shown that against quasar who LACKS those limitations like the GL's.
http://i.imgur.com/qQICRl4.jpg
Gladiator also has other powers that cover distance...freeze breath strong enough to encase Wonder Man
http://i.imgur.com/knvWWGo.jpg
Heat vision strong enough to match cyclops empowered cyclops
http://i.imgur.com/Ejzm3kb.jpg
Silver Surfer also manipulated Dr. Spectrum's energy back into his own ring. Whom is a pastiche of the Green Lanterns.
http://i.imgur.com/MB4mXYy.jpg
can tap into stars to boost items like a mindgem,not a stretch to apply that to quasar's quantum bands.
http://i.imgur.com/ttDs94y.jpg
tanked a shot from michael korvac.
http://i.imgur.com/YdaxMmX.jpg
Despite speed being equalized.....Gladiator and Surfer especially have too many options and are on a higher level of power.