I wonder how the BGCK could unearth a court case if any is pending. Incidentally, was it a civil suit or a criminal case? If it were a civil suit, you will have nothing to worry about. On the other hand, if it was a criminal case, did you mention this to TCS? Nevertheless, I don't think you will face any problem if you voluntarily submit the PCC to TCS, as it might clear the air. Probably, you should check with their HR whether you should submit it voluntarily since you have it now. It also depends on how serious the court case was; much would depend on the veracity of the case/charges, if any, framed against you.
Regards