Hi currently i am in BP03 now my manager converting to IT , which Garde i will get in IT and any increase in compensation

It depends on the no. Of experience you have. If you have less than 4 years ,probably you'll be tagged to C1 if more you'll be tagged to C2. There'll be no benefit from compensation side. Your salary remains same.

Okay , please tell me the it grades order

You will likely move to C1 grade in IT. Compensation increase is not guaranteed immediately. It varies by business unit and manager's approval. Future promotions might offer better pay.