### to_file_gpd

Write a GeoDataFrame to a file. This server exposes write via other tools (e.g., `append_gpd`, `merge_gpd`).

Note: Direct `to_file_gpd` write helper is not separately exposed; use read/merge/append patterns shown.

Related

- [append_gpd](merge_gpd.md) (vertical concat helper)
- [merge_gpd](merge_gpd.md) (attribute join)
