GacUtil.exe
Each computer on which the common language runtime is installed has a machine-wide code cache called the global assembly cache (GAC). Assemblies deployed in the global assembly cache must have a strong name. A developer tool named "Global Assembly Cache tool" (Gacutil.exe), provided by the .NET Framework SDK can be used to deploy assemblies to GAC. The global assembly cache stores assemblies specifically designated to be shared by several applications on the computer. It provides us the way to overcome "DLL Hell" problem also.
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Device Manager
Dunloy GAC was created in 1908.
Claudy GAC was created in 1934.
Portaferry GAC was created in 1912.
Castlewellan GAC was created in 1905.
Ardmore GAC was created in 1938.
Kilrea GAC was created in 1956.
Banagher GAC was created in 1965.
Bredagh GAC was created in 1973.
Bellaghy GAC was created in 1939.