Abjuration
Level: Bard 5, Cleric 6, Druid 6, Liberation 6, Sorcerer 6, Wizard 6, Urban Druid 6
Components: V, S
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Target or Area: One spellcaster, creature or object; or 20-ft. radius burst
Duration: Instantaneous
Saving Throw: None
Spell Resistance: No
This spell functions like dispel magic, except that the maximum caster level on your dispel check is +20 instead of +10.
Additionally, greater dispel magic has a chance to dispel any effect that remove curse can remove, even if dispel magic can’t dispel that effect.
Source: Player’s Handbook (Page 223)