This is my first foray into the open source world. I've got a Microsoft Excel workbook that I have some custom VBA modules in that I want to distribute under the GPL v3. I can't find much discussion on the philosophy of using the GPL with Excel, but I think it would be kind of treating it like a plugin.
Excel is independent, but my particular "plugin" requires my independent worksheets and code to add it's a new benefit. Therefore, even though Excel is a paid program, my VBA script and workbook would be covered, right? Am I misinterpreting the GPL? Would that run afoul of any other intellectual property issue?