Visual Studio - Where's my gacutil.exe?

Looking for the gacutil for your Visual Studio pre and post-build events?

Visual Studio 2005 C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin\
Visual Studio 2008 C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\
Visual Studio 2010 C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin\