If you are going in the peak season, then it is advisable that you book accommodation prior to your visit to Gulmarg.
While you are in Gulmarg, you can enjoy both vegetarian and Non-vegetarian cuisine. If you eat non -vegetarian, then do try a traditional dish, called Rogan Josh.
Though Gulmarg is very safe for tourists, it is advisable that you update yourself with the current law and order situation in the area, before you visit Gulmarg.
Gulmarg is very cold, so make sure you carry heavy woolens with you, while you tour Gulmarg.