We BizTalk developers often get frustrated with this assembly GACking stuff. Here is a cool registry setting which will make our life little bit easier.
Copy and paste the code into a notepad file and save it with extension .reg. Double click on the file and its all done.
-------------------------------------------------------
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\dllfile\shell\GAC-It\command]
@="c:\\windows\\Microsoft.NET\\Framework\\v1.1.4322\\gacutil.exe /i \"%1\""
-------------------------------------------------------
Then open explorer and navigate to your dll, right click on it, for your surprise you'll see a shortcut called GAC-It as shown below. You can put whatever name you want as highlighted in RED in the above script.
Found it from here