I have a groupox in a VB.NET winform app. The groupbox contains a few Labels, Textboxes and Checkboxes. This was created by simply dragging the controls out of VS toolbox.
Could this be a help to you?
How to Clone/Serialize/Copy & Paste a Windows Forms Control
What you could do is create a user control based upon your groupbox which would allow its reuse. You could then create the instances you require at runtime and add them to the form.
Maybe suggest that you look into creating user controls for winforms.