Yes, this bundle would include 100 sessions for the Gatekeeper or CUBE services. See the following section of the link you posted.
5.2 Starting with a Cisco Unified Border Element Bundle
A select number of preconfigured Cisco Unified Border Element bundles are available with the Cisco 2800 and 3800 Series platforms. For these platforms the Gatekeeper share licenses with the Cisco Unified Border Element, so these bundles can be used for Gatekeeper configurations also.
Hope this helps.
Brandon