How to rename GCC paths
There are 2 parts to this question:


How to make Drupal accept second paths? Go to http://example.com/admin/config/search/path and set aliases for them. You can use Pathauto to automate this process, or try one of the modules that allows wildcards in aliases.
How to make Drupal generate proper paths? Well, if above will not assure this, use Global Redirect - it'll make sure only aliases are visible to your users.