About the integration:
GoToMeeting makes it easy to connect with people any way you want. Now you can have it integrated right in your HipChat rooms.
Type "/meet" on any device and GoToMeeting will post a meeting in the room for everyone with everything you need for real-time collaboration.
The GoToMeeting for HipChat add-on works on the web, desktop, iOS and Android. Both the cloud and server (on-premise) version of HipChat are supported.
User will have to enable the integration from Atlassian Marketplace on the HipChat rooms that they own.
Supported on HipChat and HipChat Server 2.0.4 and all GTM account tiers.