Tay,
Sorry, but you are not quite asking the right question: your salary depends so much on what you are willing to do:
With a few exceptions, the really nice salaries on GIV and similar aircraft are paid either in the middle east (1 month on, 1month off IF you are lucky), or for a private client, with whom you will have to negotiate your working hours and conditions. I operate a similar class of aircraft, working 2 month for 1 month off, and get about 120k US tax free, but my customer expects a little bit more than my turning up 1 hour before block-off....
On the other hand, if you want to a) stay based in your country b) have a fixed scheduling with a monthly allowance of free days c) worry only about operating the controls as in the airlines, then you should expect to remain well below 100K US, mostly.
Tell you what: if I was a TRI/TRE on type (and I really want to be!) like you, I would not take a fixed contract anywhere, but go on the free-lance market. JAA and FAA operators of large business jet are really keen on finding qualified, presentable TRI/TRE's for a few days/weeks per year each.
The standard for a good TRE, willing and able to do OPC's, Checks of whatever you call them, is somewhere between 1000 and 1500 USD daily, and you can pretty much insist on the niceties like business class positioning and 5-star accomodation. A colleague of mine, TRE on the GV, who was not afraid to stay in Moscow or Harare for a few weeks at a time, grossed USD 325'000 last year! As a US resident, he had to pay taxes there, but was able to take all his expenses (USD 35000/year at flight safety for example) off his taxeable revenue... So not a bad deal, if you have and understanding wife, eh?
As a general rule, in business aviation, look at the work conditions first, and then determine a salary: there is much more to it than the aircraft type...