Erm... Google crawls the web. If your site is not on the web (on something like http://www.yoursite.com/) then it won't be indexed.

Otherwise, Google will index it if and when...
a) it finds a link to your site somewhere on the web
or
b) if you ask Google to.

But you website's indexing still depends on your robots.txt file, in which you can ask spiders not to index certain pages/sections of your site.

That's as complete an answer as I can give...