GSM (Graded Surveillance Measure) is an additional surveillance measure installed on a dynamic set of stocks to ensure market integrity.
There are 6 stages of surveillance actions as shown in the image below:
This is the NSE list and BSE list of GSM stocks and you will find that ‘Golden Tobacco’ is in the list with a Grade II surveillance measure.
Stage II has an Additional Surveillance Deposit(ASD) of 100% of the trade value which is what reflects in your ledger.
This amount will be released based on the following table:
Since you bought the scrip in July 2017, your ASD amount will be released back to your trading account on the 2nd Monday of Jan 2018.
Please refer to this NSE FAQ for more details.