How to create properties of similar components RowSpan, ColSpan Delphi with GridPanel

I am creating a component inheriting from the gridpanel. When I add a label, edit, or other component on the gridpanel, the edit, label ... component appears in the Row, Col, RowSpan, and ColSpan properties. How do I create a new property equal to these Row, Col, RowSpan, and ColSpan properties. Which only enables when to a component on the gridPanel? In case I want to create a new property and this property will appear for Edit, Label among others that are on the gridpanel.