How do I decompress an NSString I have that was compressed with glib

I have an NSString (e.g. eNoLycgsVgChvILSEoWS1IoSPQBFZgb4) that I get from a web server that is just a normal string compressed using glib. How do I decompress this in Objective-C? I've found some libraries but they only accept full files, not a simple string.