How far is The Hilton Atlanta from the Greyhound bus station?

It's a 30 minute walk down Peachtree St and right on John Portman if you take MARTA it will take longer.

Its across the street from the Marta and that goes to the bus station

Very close. But the shady ppl you will encounter will make a bus or uber more feasible. And beware the greyhound is a very shady place also