Set-location
"DLL Source Path"
[System.Reflection.Assembly]::Load("System.EnterpriseServices,
Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
$publish
= New-Object System.EnterpriseServices.Internal.Publish
$publish.GacInstall("DLL
Source Path\FileName.dll")
iisreset
Example
for Source Paths:-
C:\DLLS