In case you missed your chance on Gigafactory unveiling for the press a few days ago, you can catch up with a big party tonight, Friday, 07/29/2016, if you are invited:
5PM:Check-in begins at 5pm
6-9PM: Factory Tours and test rides
9PM: Remarks
After that: Tours and rides continue.
And if you still miss that in-person, you can still do a livestreaming at the company's website.
Good luck!