Does anyone have any information about the Guflstreams at Flexjet? Are they hiring into them from the inside or outside? Any news on the payscale?

no they aren't and it will be a while to get one once you are in Flexjet...

we will only have 6 by the end of the year and the 650's don't come till next year and the 500's don't come till way after that

As of right now all the slots a filled from within Flexjet. That being said, there are 75ish guys on LOA from Options that are flying at Flexjet and the G seats are about evenly split between Flex and Option pilots. The whole Flexjet/Options thing is a mess right now but getting closer to being worked out one way or the other. For each Gulfstream management hires a Pilot/Aircraft manager and he hires 4 other captains. That group staffs their A/C.