Locate Dll deployed through sharepoint solution in GAC

A sharepoint solution can have dll files which can either be deployed to the bin folder of IIS web site or to GAC.

Sharepoint 2013 solution dlls deployed to GAC can be found at “c:\windows\microsoft.net\assembly\GAC_MSIL” if dll build platform is Any CPU
and at “c:\windows\microsoft.net\assembly\GAC_64” if dll build platform is 64 bit

More information can be found at http://www.ashokraja.me/post/Locating-custom-assemblies-built-for-SharePoint-2013-in-GAC.aspx