This announcement is about the inclusion of Objective-C language runtime features that appear in 10.7 and iOS 5 in GNUStep. The runtime is responsible for providing basic language level features like message sending, reflection, IMP lookups, blocks, etc.
It doesn't involve or include any of the actual API Frameworks that are used when developing OS X or iOS applications, however. So while this will simplify porting in the sense that you won't find that there are language features that are missing in GNUStep, porting still potentially involves significant changes to your code base, depending on what APIs you were relying on and what the equivalents available in GNUStep are like.
It doesn't involve or include any of the actual API Frameworks that are used when developing OS X or iOS applications, however. So while this will simplify porting in the sense that you won't find that there are language features that are missing in GNUStep, porting still potentially involves significant changes to your code base, depending on what APIs you were relying on and what the equivalents available in GNUStep are like.