So, I don't know about anyone else, but it is a pain to use GACUTIL on systems without the .NET SDK. So, I found out there is a .NET API for GACUTIL, so now I just wrapped it in PowerShell to make it easier to use. :)

   1:  BEGIN {

   2:      $ErrorActionPreference = "Stop"

   3:      

   4:      if ( $null -eq ([AppDomain]::CurrentDomain.GetAssemblies() |? { $_.FullName -eq "System.EnterpriseServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" }) ) {

   5:          [System.Reflection.Assembly]::Load("System.EnterpriseServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a") | Out-Null

   6:      }

   7:      

   8:      $publish = New-Object System.EnterpriseServices.Internal.Publish

   9:  }

  10:  PROCESS {

  11:      $assembly = $null

  12:      

  13:      if ( $_ -is [string] ) {

  14:          $assembly = $_

  15:      } elseif ( $_ -is [System.IO.FileInfo] ) {

  16:          $assembly = $_.FullName

  17:      } else {

  18:          throw ("The object type '{0}' is not supported." -f $_.GetType().FullName)

  19:      }

  20:      

  21:      if ( -not (Test-Path $assembly -type Leaf) ) {

  22:          throw "The assembly '$assembly' does not exist."

  23:      }

  24:      

  25:      if ( [System.Reflection.Assembly]::LoadFile( $assembly ).GetName().GetPublicKey().Length -eq 0 ) {

  26:          throw "The assembly '$assembly' must be strongly signed."

  27:      }

  28:      

  29:      Write-Output "Installing: $assembly"

  30:      

  31:      $publish.GacInstall( $assembly )

  32:  }