Support reading of GML files

[koettert]

GeoPandas seems to support GML if explicitly enabled:
db = gpd.read_file('pth/to/5221132-NS7010', driver='GML', layer="my_layer_name")

GDAL has limited support to read GML files: https://gdal.org/drivers/vector/gml.html
Example files can be downloaded from here: https://git.rwth-aachen.de/malhotra/teaserplus/-/tree/master/GML-Example-files

Reading GML is also supported by the KNIME Spatial Processing extension

[koettert]

I think this is already supported but need to double check.

[UrbanGISer]

gdf = gp.read_file(self.data_url) it can be read directly