Here: https://docs.python.org/3/library/asyncio-task.html  
it says:"To actually run a coroutine, asyncio provides three main mechanisms:"

and a few pages down it gives you a fourth mechanism:
"awaitable asyncio.gather(*aws, loop=None, return_exceptions=False)
Run awaitable objects in the aws sequence concurrently."

And it really runs awaitables:
future = asyncio.gather(*awslist) # aws are run...
...                               # some other heavy tasks
result = async future             # collect results

Shouldn't it be added to docs?

I suggest thinking that gather() implicitly creates tasks for running coroutines.
The documentation is technically correct, enumeration of all potentially endless list of things that calls `create_task()` for wrapping passed coroutine is not very helpful, especially for the beginning document.