Implementing it is voluntary, there is no law requiring it, so there are probably many commercial software which lack this modul. But yes, GIMP doesn't have it too.
"The CDS has been voluntarily adopted by hardware and software manufacturers, and prevents personal computers and digital imaging tools from capturing or reproducing the image of a protected banknote."
Hmm. I wonder what the impetus for adoption is. If governments aren't making it mandatory, then there has to be something in it for canon, xerox, adobe, et al to go through the trouble of adding that functionality.