Sorry to hear this, You should go to the police ASAP and let them know of this, the gated community is obligated to provide you the footage. You should lodge an F.I.R and let Police look into the matter.
The police can gain access to the footage instead of you. The perpetrator can be held for theft.
Section 382 of the Indian Penal Code:
Theft after preparation made for causing death, hurt or restraint in order to the committing of the theft.
Whoever commits theft, having made preparation for causing death, or hurt, or restraint, or fear of death, or of hurt, or of restraint, to any person, in order to the committing of such theft, or in order to the effecting of his escape after the committing of such theft, or in order to the retaining of property taken by such theft, shall be punished with rigorous imprisonment for a term which may extend to ten years, and shall also be liable to fine.
Rest assured and have faith in the Police department you will get your bike back.