Hi Selvin,
It may help you to know that here in France plasterboard comes in different specifications according to the intended purpose. There is some that is pink in colour which has a higher fire resistance rating, some which is tinged greeny / blue that is more water resistant (for use in bathrooms), and then the rest can be either a rougher brown coloured finish which is used when it’s going to be skimmed over with plaster or tiled, or a whiter and smoother finish which is intended for ‘direct decoration’ where either paint or wallpaper is used directly onto the board.
There is also plasterboard which polystyrene insulation already bonded onto the back of it.
Have a look at this link where you will find lots of information. https://www.bricodepot.fr/catalogue/construction-renovation/materiau-gros-oeuvre/cloison-plafond-plancher/plaque-de-platre-panneau-dagencement/#p1n20srelevancy
Good luck with your project.