FSDreamTeam has posted a brief preview video demonstrating the new variable clothing feature coming to GSX. Basically, ground crew will now change clothing based on weather conditions. The update (designated Version 2.7) will be free of charge for existing users although the feature is only compatible with Prepar3D V4.4+. Release is currently planned for this coming weekend.
No additional information was provided regarding any other possible items that might be included as part of the update.
For more information about GSX or GSX Level 2, visit the developers website. Stay tuned for a release announcement.