Description of the desired feature

GeoJSON is a standard plaintext OGR format (https://gdal.org/drivers/vector/geojson.html) often used for web mapping and data interchange, and this file format is also rendered by GitHub natively (see https://docs.github.com/en/free-pro-team@latest/github/managing-files-in-a-repository/mapping-geojson-files-on-github), making it an ideal format for sharing online.

There's some action at GenericMappingTools/pygmt#608 on integrating PyGMT with Geopandas, and being able to read GeoJSON directly into GMT plot would really help to simplify the coding! Currently GMT can read shapefiles (https://docs.generic-mapping-tools.org/6.1/cookbook/file-formats.html#shapefiles) via GDAL, but it would be nice to extend this to the GeoJSON format (this is a smaller scope than full OGR vector support as in #3013).

Are you willing to help implement and maintain this feature? When I pick up C programming 🙂