Abstract: A pivotably-mounted extendable gate for restricting access by infants or pets through an opening defined by a pair of opposed vertical surfaces or walls. The gate is pivotably mounted via hinges pivotably attached to the gate which are slidably received within sleeves of retaining brackets mounted to one of the walls. The gate is extendable and retractable via two separate and similar gate members which are slidably coupled together. A pair of vertically-spaced-apart receptacles mounted on the opposite walls receive upper and lower portions of one of the gate members to prevent pivotable movement of the gate when so received. A latch provided on the upper portion of the gate engages with the upper receptacle to prevent sliding movement of the gate.