That just says a 4.0 scale (as opposed to out of 100% or 11.0 scale) – it doesn’t say the scale can’t be weighted or has a maximum of 4.0. Regardless of the CDS instructions, the full GPA section is all done on the same scale — both the percentages and the mean. This is evident if you compare percentages to other colleges that do report on a max 4.0 scale.