Helium was crafted with love by the RocketTheme team to showcase the capabilities of the Gantry 5 framework. Helium is open source and available for free under a dual license system (MIT or GPL version 2 or later). You do not have to keep the Gantry or RocketTheme links and logos in the front end, however, you must ensure that all copyright notices in the code are retained.
Documentation for Gantry 5 is available on the official Gantry website. You can submit any issues or feature requests for Gantry through GitHub. A chat room has been set up using Gitter where you can go to talk about the project with developers, contributors, and other members of the community. This is the best place to go to get quick tips and discuss features with others.