In actuality something like what like WinPAWS by Douglas Harter would be awesome, but a cross platform executable would be optimal... Minus the redundant registration bs.NGPaws
by Carlos Sánchez might be for you? PAWS inspired, no registration, and compiles to web browsers!
Concerning the OP, I'm afraid the answer is not. You're stuck with PAWS technical manual, which explains quite a few things, but not them all, and not in a way meant for creating a proper reimplementation (but is a good starting point if you feel ready to figure out the rest reinverse-enginering on your own).
Anyway, Mr Tim Gilberts have lately been active on rescuing his old Gilsoft related stuff, take a look at 8-bit blog HERE
. I know for certain he is busy struggling to recover his more obscure early works, but dropping a line might prove useful!