Gaia Data Releases
General info on Gaia Data Releases can be found here. More specific information on the Gaia's first data release is available here.
Three stellar positions released to suport unique occultation events (23/05/2017)
We released the astrometry for three stars to support the observations of unique occultation events. On 22 June and 23 July 2017 relatively brights stars will be occulted by the largest known centaur Chariklo. Then on 5 October 2017 an occultation by Neptune's largest satellite, Triton, can be observed. The preliminary Gaia DR2 data for the three stars and more information about these events can be found here.
Gaia Photometric Science Alerts
To browse the Gaia Science Alerts published so far, visit the Photometric Science Alerts website. More information about the alerts is available here.
Gaia Follow-Up Network for Solar System Objects
The Gaia Follow-Up Network for Solar System Objects (Gaia-FUN-SSO) has been set up in the framework of a task (DU459) of  Coordination Unit 4 (Object processing) of the DPAC Gaia consortium. Its goal is to coordinate ground-based observations on alerts triggered by the data processing system during the mission for the confirmation of newly detected moving objects or for the improvement of orbits of some critical targets. Gaia scans the sky following a pre-defined scanning law. Ground-based observations are required to avoid the loss of newly detected Solar System objects and to facilitate their subsequent identification by the probe. The GAIA-FUN-SSO site provides access to solar system object alerts, including the ephemeris to help finding the targets for the registered members of the Gaia Follow-up network.
Search for a source in TGAS

You can now perform a simple search in TGAS using this search widget. More elaborate searches can be performed in the Gaia Archive of course.