$query = New-Object Microsoft.SharePoint.Client.CamlQuery

$stringBuilder = New-Object System.Text.StringBuilder

$stringBuilder.Append("<View>");
$stringBuilder.Append("<Query><Where></Where></Query>");
$stringBuilder.Append("<ViewFields>");
$stringBuilder.Append("<FieldRef Name='ID' />");
$stringBuilder.Append("<FieldRef Name='GDOCFamillyCategory' />");
$stringBuilder.Append("<FieldRef Name='Title' />");
$stringBuilder.Append("</ViewFields>");
$stringBuilder.Append("</View>");

$query.ViewXml = $stringBuilder.ToString();
$items = $List_Doc.GetItems($query);
$context.Load($items)
$context.ExecuteQuery()