Retrieving a CGI generated page normally isnt different from retrieving a static page. Check QandASection: HTTP and FTP clients for several examples (since this question has been asked dozens of times before).
For the record: YES, LWP::Simple would be a way, but shell calls to wget or lynx --dump are also pretty common.

Greetz
Beatnik
... Quidquid perl dictum sit, altum viditur.