There are two systems available for automated swing gates:
Ram operators are normally installed centrally on the inside of your gate. These are an ideal retrofit to existing gates and are a more cost-effective solution.
By far the least obtrusive as the motors are installed below the ground, these systems require additional groundwork. But once complete, they are a very discreet method of automation. Underground motors have a superior robust design, giving the most reliable product for intensive use sites.