Hi Satish,
Regarding Qatar - You cannot get a work/residence visa in Qatar, if you have a valid residence permit of any other GCC country. I am sure about this, since I had gone thru the same situation. I got a transfer from Dubai, to Qatar, but had to cancel my UAE residence permit to apply for Qatar RP. This rule is not the same for all GCC countries. I beleive that in UAE, there is no such rule.Anyway good luck!