Help !!!!

Respected Friends,

Please help me ,

                            My brother  gifted a land to me. The gift deed has been registered. And even                                                 I constructed house on that gifted Land.

                                Everything   was alright. After 2 years, my brother                                                                        was  in    debt. He want to take a loan, but he has no property to mortgage, So  he demanded back  that gifted Property, I told him that I have constructed a house on that and I can’t return back to him. So he told  me    that                           he will cancel my gift deed.

                         Will it possible? Can he cancel the gift deed?

                    Please help me.