I have given my review of the film, but after seeing it twice (the first time in regular 3D, second time in IMAX 3D, definitely worth seeing it in IMAX) I really felt like I should write an in-depth analysis over my interpretation of the film, simply because I want to.
Gravity is a simple film that boasts its message through vivid imagery, while also playing off the emotional fear/suspense of the audience itself. To put it plainly, Gravity is about rebirth, to rise up when life has you beaten and become something new, something stronger, you see this plainly all throughout the piece. There is also a constant struggle going on in Cuaron's film, so many times you will see an attempt to latch onto something that seems so close and you will continually see failure, there is never any immediate success. The film is an allegory of overcoming trials, when gravity pulls you down, you get back on your feet and keep moving.