functions/Add-ToGAC.ps1

function Add-ToGAC{
    param(
        [Parameter(Mandatory = $true)]
        [string]$FilePath
    )

    begin{
        [System.Reflection.Assembly]::Load("System.EnterpriseServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")
        $publish = New-Object System.EnterpriseServices.Internal.Publish
    }
    process{
        $publish.GacInstall($FilePath)
    }
}