Are you asking for us to teach you GDL, or are you asking in the hope that someone will just create the object for you?
If you want to learn GDL and how to do this, similar questions have been asked and some of us can point you to both the beginning tutorials (DNC's Object Making book, a free PDF) as well as the threads where people have shown how to create labels.
You say for 'wall, roof and slab' finishes - so do you want this object used as an automatic label of those elements, or are you looking for just a simple 2D object with parametric text (which, by the way, cannot be scheduled)?
Cheers,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB