Could a modern movie such as "Gravity" have been constructed/produced/directed by a crew who never went to college? [closed]

There is formal education. And, there is informal education. You would have to have an education in order to make a film like Gravity. It would not necessarily have to be a college/university education.

In order to have the ability to make such a film, you would have to acquire the proper education, training, coaching, etc., along with a bit of natural ability. Like a professional athlete, natural ability alone will not be enough. Some type of education along with very hard work would be in order. That education can be had in many different ways. You can be self-taught. You could do independent research. You could even be mentored by or apprenticed to an experienced filmmaker. All of that is education.

By all accounts that I can find, writer/producer/director Quentin Tarantino never finished high school. Yet, he is now a well established filmmaker.

On the other hand, acquiring the resources to make a film is another story. In order to get investors or studios to give you the resources needed, a college/university education is superfluous. Your actual experience and previous work/successes are what will be important. A brand new graduate from the most prestigious university will hold less sway and clout with studios and investors than a high school drop out with blockbuster film making credits under his belt.