I am happy to announce my LazGTFS a freepascal/Lazarus tool-box for the "General Transit Feed Specification".
GTFS or the General Transit Feed Specification defines a common data format for public transportation schedules and associated geographic information.
This free pascal code allows the working with those data.
The project is in very early state, so only one unit with only a subset of the GTFS static feed is implemented.
This state allows to read an existing GTFS static feed and perform basic operations on the read tables.
A very small and simple example show how to use the very basic functionality.
The whole thing could be downloaded from
https://gitlab.com/EkkehardDomning/lazgtfs