Try a long stick. Go out farther than the farthest away hen, position yourself so that the chickens are between you and the coop or run gate. Tap the ground and say "hut, hut" or something similar. Step forward moving slow, and only move forward until the chickens begin to walk away from you toward the coop. When they stop, you take a step or too, tapping the ground calling, but just until they begin to move, then stop. This is a case where going slow is faster. If a bird try to get by you, just tap the ground near her. If she does escape, just ignore her and keep pressuring the other birds.
If you have a bit of scratch on the ground just inside the gate, it will help, them a bigger pile farther in. Now go back and repeat with any of the birds that got away.
If you move slow, you can quickly gather a flock up anytime of the day if you want to pen them.
Mrs K