Autodesk Inventor - include frame generator length G_L in iProperty

How to format frame generator member length (G_L) and include it in an iProperty? Steps:
1. Copy a standard family to a read/write library
2. Replace family template with the one that is changed (decimal numbers in this example)
3. Create a new column in family table that includes length parameter G_L and map it to an iProperty

[@leoborba1120]

So useful, thanks keep doing this great job. ;-)