Updated: Nov 21, 2019
Devotech iDAS has the ability to create a survey grid in model space within seconds, however it is sometimes necessary to create a survey grid only for a viewport in the layout. Autodesk Civil 3D contains a tool that creates a survey grid around a viewport, unfortunately it can't multiply the coordinates by -1.
A .lsp file is available online which also creates a survey grid around a viewport, again, this option can't multiply the coordinates by -1.
Devotech Group of Companies modified the .lisp file to adhere to the South African conditions. See the video below for the entire workflow.
You can download .lsp file in the zip format from the link below:
Note: When you download the file, it might be renamed to a unique name. Just rename it as per your needs.