Not sure if you're still looking but the closest I could find to a spec/manual was in perlfaq9 : RFC Memo on 'The Common Gateway Interface (CGI) Version 1.1' from 2004.

"...the adversities born of well-placed thoughts should be considered mercies rather than misfortunes." — Don Quixote

In reply to Re: CGI.pm manual? by luis.roca
in thread CGI.pm manual? by dwalin

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