prstat output in GB

Hi,
Is there any way by which the unit of size and rss will be only GB while I am running the prstat command?

I think it depends on the virtual memory. If you do a

prstat -s size

It should give the prstat sort by size( mostly in MB)

Yeah, I guess it depends on the amount of virtual memory being used up (or for that matter the RSS also).
But what I was looking for was a command wherein I would not have to do any calculation on my own.
Anyway I think there is no way out of this situation except for writing a script :(.