Can any one suggest how do i get plasmid pGP704 ?
I recommend you look up papers where pGP704 was used in the methods and then the paper should provide their source. Call the source and ask. I imagine the Harvard or Yale microbial library has the plasmid you are looking for.
Here you have author and some publications
http://plasmid.med.harvard.edu/PLASMID/ … ctorid=249