A gate stop (10) for a gate (1), the gate (1) is adapted to be rotatable about a substantially vertical axis (Y) at a hinged end (2) of the gate (1). The gate has a frame (2) with a lower portion (6) and is hinged to a support structure, such as a vertical gate post (3), typically embedded in the ground and secured in a hole with cured concrete. The gate stop (10) includes a clamp (20) to engage with the frame (2) on the lower portion (6). The gate stop (10) further includes a prop shaft (30). The prop shaft (30) is attached to the clamp (20) at an attached end (31) of the prop shaft (30). The prop shaft (30) is movable between a stowed position and a ground-engaging position in which a ground-engaging member at the remote end (31) is adapted to engage with the ground surface.