Here are some of Doorking's popular Slide and Swing Gate Operators...
Doorking DKS 9100-080
The 9100 is designed so that it can easily be mounted in the front, center or rear of the gate without any costly and time consuming field modifications.
The DKS swing gate actuator offers convenience and reliability in a compact design. The actuator mounts directly on your gate and pilaster, simplifying installation and eliminating the need for concrete pads.
The 1601 operator is designed for single lane (14 ft. max) vehicular traffic control in high traffic commercial and industrial applications. The 1601 operator is designed so that it can be mounted on either the left or right hand side of the roadway.