Categorias en Gridlist

[Nexus#]

Hola, tengo un problema al crear categorias a mi sistema de vehiculos quiero crear categorias como Rapidos, Fuertes Deportivos, 4 Puertas, etc. Pero no puedo lograr hacerlo aqui dejo una foto de como lo tengo y el client-side del Script.

Foto:

Client-Side

carshopWindow = guiCreateWindow(41, 56, 442, 426, "Venta de Autos", false) 
guiWindowSetSizable(carshopWindow, false) 
guiSetVisible(carshopWindow, false) 
guiSetAlpha(carshopWindow, 1.00) 
  
carGridList = guiCreateGridList(13, 28, 188, 383, false, carshopWindow) 
guiGridListAddColumn(carGridList, "Vehiculo", 0.5) 
guiGridListAddColumn(carGridList, "Costo $", 0.5) 
for i = 1, 2 do 
guiGridListAddRow(carGridList) 
end 
guiGridListSetItemText(carGridList, 0, 1, "Rapidos", true, true) 
guiGridListSetItemText(carGridList, 0, 2, "", true, true) 
guiGridListSetItemText(carGridList, 1, 1, "Fuertes", true, true) 
guiGridListSetItemText(carGridList, 1, 2, "", true, true) 
buyButto = guiCreateButton(225, 275, 184, 46, "Comprar", false, carshopWindow) 
guiSetFont(buyButto, "default-bold-small") 
guiSetProperty(buyButto, "NormalTextColour", "FFAAAAAA") 
closeButton = guiCreateButton(225, 359, 184, 42, "Cerrar", false, carshopWindow) 
guiSetFont(closeButton, "default-bold-small") 
guiSetProperty(closeButton, "NormalTextColour", "FFAAAAAA") 
guiLabelSetVerticalAlign(placa, "center") 
colorButton = guiCreateButton(225, 62, 184, 46, "Elegir Color", false, carshopWindow) 
guiSetFont(colorButton, "default-bold-small") 
guiSetProperty(colorButton, "NormalTextColour", "FFAAAAAA") 
------------- 
local cars = { 
  {411, 1000000} 
} 
for i, v in ipairs(cars) do 
  local carName = getVehicleNameFromModel(v[1]) 
  local row = guiGridListAddRow(carGridList) 
  guiGridListSetItemText(carGridList, row, 1, carName, false, true) 
  guiGridListSetItemText(carGridList, row, 2, tostring(v[2]), false, true) 
  guiGridListSetItemText(carGridList, row, 3, "N/A", false, true) 
end 
guiGridListSetSelectedItem(carGridList, 64, 1) 
guiSetAlpha(carGridList, 1)