How to upgrade my android 2.2 froyo to 2.3 gingerbread.?

[Samruddha Shettigar]

I'm using samsung galaxy pro. Which is android 2.2 enabled. How to upgrade it for 2.3. It has qualcomm processor, 180 mb inbuilt memory, 4 gb sd card, 279 mb ram.........
Can any 1 plz help me.....