Until the end of 2015, there were 22 metropolitan regions in France (not counting the 5 overseas regions). As of 2016, the 22 regions have been reduced to 13 (12 mainland + 1 Corsica).
The new regions are:
Bourgogne-France-Comté (former: Bourgogne and Franche-Comté)
Nouvelle-Aquitaine (former: Aquitaine, Limousin and Poitou-Charentes)
Normandie (former: Basse-Normandie and Haute-Normandie)
Grand Est (former: Alsace, Champagne-Ardenne and Lorraine)
Occitanie (former: Languedoc-Roussillon and Midi-Pyrénées)
Hauts-de-France (former: Nord-Pas-de-Calais and Picardie)
Auvergne-Rhône-Alpes (former: Auvergne and Rhône-Alpes)
Centre-Val de Loire
Pays de la Loire
My map also shows some strange things in the region Grand Est. It looks fine on the general overview of all regions, displaying 2/13 (I have Grand Est and Île-de-France). But when I have a closer look on the region of Grand Est, 2 of the 9 departements displayed are greyed out, although there should be 10 departements (it seems that Dep. Marne is still still displayed as one, but now there are Marne and Haute-Marne).
So there is still a lot wrong with the French Map on Project-GC. :)