Use the GTFS conversion tools in ArcGIS Pro to visualize your GTFS stops and route shapes in a map and update your GTFS stops.txt file.
As of version 2.2, ArcGIS Pro contains tools for working with GTFS data in the Transit Feed (GTFS) toolset in the Conversion Tools toolbox.
The GTFS Stops To Features tool converts a GTFS stops.txt file to a feature class of points you can view in the map. The GTFS Shapes To Features tool converts a GTFS shapes.txt file to a polyline feature class showing the physical paths taken by vehicles in the public transit system.
The Features To GTFS Stops tool converts a point feature class into a GTFS stops.txt file. You can use this tool in combination with the GTFS Stops To Features tool to edit and update your GTFS stops.txt file.