There is the (www cgi) package at

http://www.glug.org/people/ttn/software/guile-www/

Documentation at

http://www.glug.org/people/ttn/software/guile-www/doc/cgi.html

Also consider mod_lisp,

http://www.fractalconcept.com/asp/Ome/sdataQI5V-x95-7nwDM==/asdataQuvY9x3g$ecX

http://community.schemewiki.org/?mod_lisp