The popular way up Rocky Mountain in north Georgia is from Unicoi Gap, but if the parking lot is full or you want a little more solitude on the way up, try this alternative. From the other side of the mountain, begin at Indian Grave Gap, travelling up the Appalachian Trail 860 feet in just over a mile. Two nice views to the south reward your hard work.
Getting to Indian Grave Gap will most likely require a vehicle with some ground clearance or 4-wheel drive. There is a creek crossing right as you turn on to Indian Grave Gap road and unless the water level is very low you're not going to want to try in a sedan. I've been told Tray Mountain Road from the south is accessible by sedan, but would be a bumpy ride.
There's room for 5-10 cars to park at Indian Grave Gap. The AT crosses the road without indication of which direction is northbound or southbound. This hike heads south along the AT on the same side of the road as the parking pull-off. You should quickly pass a sign with the mileage to Unicoi Gap or you're going the wrong way.
The trail immediately climbs up Rocky Mountain at a steep rate, helped along by numerous sets of stone steps, making the trip all that more taxing. Near the top, angled bare rocks make the path more difficult if wet.
Just before reaching the first open view, you'll have several partial views as you hike along the steep hillside. At just under a mile you'll reach the first open view, and another tenth of a mile later a second one. Both views are aided by bare rock which provides a gap in the surrounding trees and brush. Look for Yonah Mountain in the distance.