route_type for schoolCoach Netex

### Introduce yourself

Hello, i am Pauline,
I work for a public transport authority in France. We produce GTFS feeds internally, and we also work with a contractor who converts our data into the French NeTEx profile.

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With the release of NeTEx 2.4 (including the French profile), new submodes such as schoolCoach are being introduced.

Is there any plan to update or extend the GTFS route_type values (or related extensions) to better support these new NeTEx submodes ?

If not, are there recommended best practices for mapping such NeTEx submodes (e.g. schoolCoach) into the existing GTFS route_type framework?

Thank you!