Wondering,
The G280 shouldn't have an issue in the ME. The Astra, Astra SP may do but I can tell you for a fact the G100, G150 and the G200 don't anymore. We take our IAI built Gulfstream data plated aircraft to Beirut, Jordan, Qatar, Dubai, Yemen, Egypt etc with no hassles. Years ago in Beirut we had an issue, but Gulfstream resolved this with the AIS and all was well again.
The 280 will be a good aircraft. Beats a Chally 300 hands down. Falcon 2000S however is cheaper slightly...