The GCT Student’s Co-operative Stores is registered under the Co-operative Societies Act. 1961 of the Government of Tamil Nadu. The Principal is the Ex-officio President of the stores and two staff members render honorary services as Vice-Principal and Secretary of Stores. Four Directors for the stores are elected by student representatives. The store sells books, instruments, stationery and other articles required by the student. The annual turnover of the stores is nearly Rs.10,00,000/-. 
​All students become Associate members of the Stores by paying five rupees as associate membership fee.