Google Sites isn't (to my knowledge) set up to use Perl as a back-end service. Read: Google Sites Gadgets, and Developer's Guide (a publication of the API). It appears that Java and Python are supported out of the box.

If you want to do something dynamic with Perl, on the cheap, you can deploy a web application to Heroku, with single-instance apps being free. See Mojolicious::Command::deploy-heroku, for example.

You certainly could link from your Google site to an Heroku app that provides the dynamic content.

Since you are okay with not using Google Sites but feel comfortable using Perl this is way too broad a question. You do not even specify what you are proposing to do on this proposed page -- what type of data you are planning to show, what type of processing...nothing. This entire node should be reaped.

My intent is grab stock prices from google/yahoo. Process them, compare them. Add/data etc and search more data for these stocks from other websites or put a link etc for other sites etc. So basically given a stock name I want to put forth data related to stock. I have perl script using LWP module to see stock info and post process that info. What I need to know is how to publish this data on a website I can see so I dont have to go all over the web to find data I need. I am asking for expertise in publishing the info I have onto a website. Hope this is clear.