The East Face of North Gateway is closed to climbers every year from around Feb 1 until early August, depending on when the birds fledge. It's not posted out there, but since the closure has been in effect for 20+ years it is incumbent on climbers to know about closures by stopping in at the visitor center and asking. The falcons always nest in a big pothole above the traverse ledge and below the Kissing Camels arch.
Climb the right side of the pillar just right of Cowboy Boot Crack. From the top of the pillar, step up to a pin, then continue up to the crack above. At the top, either step left to use the anchor for Cowboy Boot Crack, or build your own, and then downclimb off the back.
This is one of those Garden routes that folks really shouldn't climb. That pillar is simply a large block that is marginally attached to the main wall. It will eventually fall off and climbing on it will definitely decrease the life of this feature. Besides, it really isn't a route worth climbing....