We don't have an ETA on this yet. But, we're working on adding more networks on board. Tell us what you'd like to see by filling the channel request form here: https://goo.gl/Wt6xAh . It'll help us prioritize requests.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more