Answer:   GAC is the short version of "Global Assembly Cache". It is a common place in the OS where assemblies that are going to be shared between different applications can be stored.

Answer:   GAC stands for Global Assembly Cache. Whenever CLR gets installed on the machine, GAC comes as a part of it. GAC specifically stores those assemblies which will be shared by many applications. A Developer tool called Gacutil.exe is used to add any file to GAC.