gp_draw_circle.py

def draw_circle(gp_frame, center: tuple, radius: float, segments: int):
    # Init new stroke
    gp_stroke = gp_frame.strokes.new()
    gp_stroke.display_mode = '3DSPACE'  # allows for editing
    gp_stroke.draw_cyclic = True        # closes the stroke

    # Define stroke geometry
    angle = 2*math.pi/segments  # angle in radians
    gp_stroke.points.add(count=segments)
    for i in range(segments):
        x = center[0] + radius*math.cos(angle*i)
        y = center[1] + radius*math.sin(angle*i)
        z = center[2]
        gp_stroke.points[i].co = (x, y, z)

    return gp_stroke

gp_stroke.draw_cyclic = True
shows error

@rHohith - It looks like this was changed to 'use_cyclic' in Blender 2.9