Can you repossess a vehicle behind a locked gate in Texas?

If the gate is unlocked for any reason, the car can be repossessed. So, if we are talking about a gated apartment/community -- yes, as anyone can follow another car into the apartments or community. If we are talking about a locked garage, that is never opened...the car is not being driven at any time... then no. But you are going to have to have proof that someone broke in. Your word against a lender will not get it back. Remember, the repossession is being done, as payment has not been made--the car technically belongs to the lender until it is paid off.