You might be wondering what the GP number is for, say parcel boundaries so you can edit the colour of parcel boundaries, for example. To find the GP code for anything in Quickmap, find an example of what you want to change, select it using the Info tool then press F9. The GP concerned will be displayed in the title bar of the Symbology pop up.

So to answer the original question “What is the GP number for parcel boundaries?”, we can select a parcel, hit F9 and you will see that the symbology editor shows that the parcel boundary is GP2 (or GP14 if you selected a post Land Online parcel).