Preface: I'm a mechanic who worked on G200s for a few years, a decade ago. I went to FlightSafety for MX Initial and the airplane I was taking care of was owned by a Fortune 500 company but managed and occasionally chartered by the company I worked for.
It's not a bad airplane from my perspective, but it does have some downsides that Gulfstream got rid of with the 280. People hear the name Gulfstream and they expect an airplane with a lot more ramp presence, it sits low on the ramp.
The engines are not served well by electric starters because they are just a little too big, and when you consider the fact that it has a GTCP-150 APU there's plenty of bleed air available (the 150 is commonly used on large cabin jets with air starters) you wonder why are they trying to kill the batteries?
The flat/slat/Krueger system is one of the things the 280 did not keep, and the inflatable boots on the wings and the tail. It became enough of an embarrassment they started making silver leading edge boots to mimic a heated leading edge. And both systems, the flap/slats and the boots are not super difficult to troubleshoot but it requires time and sometimes equipment from the manufacturer and I've heard that they won't just send you the box with a set of instructions, now they require a tech to accompany the equipment and it gets expensive exponentially.
Engine changes are not a big deal, FADEC makes them pretty much plug and play. The worst thing anyone maintaining a G200 for any appreciable amount of time will find is the lack of a Structural Repair Manual. Almost all Gulfstreams have an approved SRM, it gives guidance when a repair is needed that isn't addressed in the Aircraft Maintenance Manual. Engineering dispositions become the norm and and they aren't cheap or quick.
Having said all of that, the best time I ever had in corporate aviation was taking care of that G200, the crew was great, the owner was great and I guess me and the airplane got along pretty well. It's not a G-IV, but that's not was it was meant to be. Go forth and prosper.