Gravity font here refers to the font used in the poster of Gravity, which is a 2013 3D science fiction thriller and space drama movie about two astronauts working to survive after a Space Shuttle accident.
The font used for the title of the TV series is probably Futura Medium designed by Paul Renner. The font is a commercial one and more details about it can be viewed here.
Download Futura Font
The Futura font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.