You might be surprised to learn that a rating on a "small aircraft" aircraft such as a GIV will cost you a lot more that a A320/737 rating. Why dont you approach NAS, SAMA, Saudia, AlWafeer..... failing that, seek out Arabasco, or the cloud seeding company in Riyadh, failing all that, talk to Rabigh Wings about doing a FI rating with them and teaching with them to build your hours.
Unless of course you did your licence in the Philippines, then good luck with convincing anyone that you have ever flown an aircraft.
Mutt