A gate assembly is disclosed including a gate rail and an upright including a plurality of walls defining a cavity therebetween. A first of the walls includes an opening that is configured to receive the gate rail therethrough such that the gate rail extends into the cavity. The gate assembly further includes a gate corner insert configured for insertion into the cavity of the upright through a second opening of the upright. The gate corner insert includes a base and a plurality of protrusions extending from the base. The base and the plurality of protrusions define a second cavity therebetween with first and second protrusions of the plurality of protrusions defining a third opening in communication with the second cavity. The third opening and the second cavity are configured to receive the gate rail therein for removable attachment to the gate corner insert.