The GDO is part of the Driver Information Center (DIC). The GDO is provided battery voltage at all times. If battery voltage is lost, the GDO unit has a non-serviceable internal power backup supply. The unit is programmed using the customer's hand-held transmitters for their garage door(s), electric entrance gates, or lighting and security systems.

The GDO is rolling code capable. Rolling code is a system that allows the code that the customers receiver receives from the GDO to change every time the GDO is used within operating range of the receiver. When the receiver and the GDO are initially programmed together, a code count is established. After that, a new code count is created for every new transmission. The software in the receiver recognizes the GDO code count as valid and accepts the command from the GDO.

The GDO is compatible with most, but not all, types and brands of transmitters. If a problem should occur with a compatibility conflict with a transmitter, call HomeLink™ at 1-800-355-3515.