Does anybody knows if is possible on GH to create a script that convert one number from a slider to 3d text (not dot text) (like typical text tool on Rhino)
You could try the txtLines component from Giulio's site http://www.giuliopiacentino.com/static/txtLines.ghx.
This component creates curves of the text in the font of your choice and then you could planarSrf them and extrude if you need 3D