Hello,

It won't be possible for you to pursue nursing course in government college in full time mode along with doing your postal gds  job, if a sabbatical of specific years is allowed then you can opt for that in case you get the job, otherwise you cannot pursue nursing degree program and do your government job at the same time, moreover nursing as a course has practical applications as well, hence it's not merely study of theoretical concepts, unlike say you pursue something in distance mode, that you can easily manage with government job.