GPS point grid generator

Hi,
most of gcs app offers survey areas with gps grids that can be modified per user requirements.

I want to use the downloaded gps tables that contains all the waypoints as tracking path on a map.

What I want to change and edit are the followings;
Approaching path manipulation,
Entry/exit point editing
Grid area manipulation to add extended overlaps to make up a coverage.

so the resulting waypoint tables after this script should work when simulated for moving the vehicle on the extended path.

Please check this link which I am trying to summarize this requirements with examples
http://pf4.36io.co/2022-03-18-custom-mp.html
The link above has youtube, images and description of this project in details

My budget: usd 50
terms: 7 days