How to properly render a layout from ItemTemplate (ViewCell) to use as a cell in UICollectionView?

I'm using the GridView control from Xamarin-Forms-Labs and even though the control makes use of ItemTemplate, the custom ViewCell can only have one layout. I was trying to use AbsoluteLayout with a StackLayout / Grid in it so that I can layer a background image with a grid over top.

How do I properly render the layout in the iOS renderer so it draws the cell? Can I accomplish this with just the methods from the Xamarin.Forms API or is there more work to be done?

Here is some of the code used to render it currently:

 // GridViewRenderer.cs
    public UICollectionViewCell GetCell (UICollectionView collectionView, NSIndexPath indexPath)
    {
        var item = this.Element.ItemsSource.Cast<object> ().ElementAt (indexPath.Row);
        var viewCellBinded = (Element.ItemTemplate.CreateContent () as ViewCell);
        viewCellBinded.BindingContext = item;

        return GetCell (collectionView, viewCellBinded, indexPath);
    }

    // GridViewCell.cs
    private void UpdateView ()
    {
        if (this.view != null) {
            this.view.RemoveFromSuperview ();
        }
        this.view = RendererFactory.GetRenderer (this.viewCell.View).NativeView;
        this.view.AutoresizingMask = UIViewAutoresizing.All;
        this.view.ContentMode = UIViewContentMode.ScaleToFill;

        this.AddSubview (this.view);
    }