Hi vivmehta,
With the information seen on the above 3 notes, there is nothing much we can know about because it's all administrative notes. No visa officer had assessed your file until 10th March (the date you applied GCMS, notes get generated as of that day - i.e. as of 10 march only, and it is sent out exactly after 30 days, so you received it today).
As I said - you shall apply another GCMS notes now.
If you have doubts on your file, like documents lacking the information eg. employment letter without job duties, or anything like that, then start accumulating proper documents and send them only upon request from CIC in near future, by chance such thing happens to you.
Also do call to CIC customer care as they can access you file and can let you know with problematic information, if any.
Keep posted if you get any additional information, will try to help accordingly.
Thank you.