Mach es wie KingClem sagte, mit Array und Schleife:
//
new parkplatzobjects[11];
parkplatzobjects[0] = CreateDynamicObject(19454, 1353.74, -1754.48, 12.30, 0.00, 90.00, 90.00);
parkplatzobjects[1] = CreateDynamicObject(19454, 1344.11, -1754.48, 12.3, 0.00, 90.00, 90.00);
parkplatzobjects[2] = CreateDynamicObject(19454, 1344.11, -1743.98, 12.31, 0.00, 89.90, 90.00);
parkplatzobjects[3] = CreateDynamicObject(19454, 1353.74, -1743.98, 12.31, 0.00, 89.90, 90.00);
parkplatzobjects[4] = CreateDynamicObject(19454, 1344.11, -1747.48, 12.31, 0.00, 90.00, 90.00);
parkplatzobjects[5] = CreateDynamicObject(19454, 1344.11, -1750.98, 12.31, 0.00, 90.00, 90.00);
parkplatzobjects[6] = CreateDynamicObject(19454, 1353.74, -1750.98, 12.30, 0.00, 90.00, 90.00);
parkplatzobjects[7] = CreateDynamicObject(19454, 1353.74, -1747.48, 12.30, 0.00, 90.00, 90.00);
parkplatzobjects[8] = CreateDynamicObject(19362, 1360.16, -1754.48, 12.30, 0.00, 90.00, 90.00);
parkplatzobjects[9] = CreateDynamicObject(19362, 1360.16, -1750.98, 12.30, 0.00, 90.00, 90.00);
parkplatzobjects[10] = CreateDynamicObject(19362, 1360.16, -1747.48, 12.30, 0.00, 90.00, 90.00);
for(new i = 0; i < 12; i++)
{
SetDynamicObjectMaterial(parkplatzobjects[i],0,6213,"lawwhitebuilds","ws_carpark2",0);
}