Hello,

If you choose to enroll in IIM for PGP or even executive courses for that matter, you will be required to do it in full time basis,  hence it's not possible to continue your studies along with pursuing a government jobs, you can either take a sabbatical regarding this if it's permissible, else you have to leave your job, and come to the campus to attend lectures, doing assignments etc, basically you will have a quite busy schedule, and it demands 100% commitment and devotion on your part to pursue the same, hence it's better you decide what option to go ahead with accordingly.