Hello and

and to the Gulf Stream Owners Forum. We are glad to have you join us here and we look forward to reading of your adventures and experiences. I am sure you will enjoy the website and forums. Good luck, stay safe and keep us posted.
One thing you can try is to add a wind breaker in front of the door jamb. This is a 1" X 1" angle aluminum or stainless steel piece that can be adhered to the wall with a double sided tape. This causes the wind to be diverted around the door opening. Let us know what you decide and/or try to resolve this.
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Mike, Certified Master RV Technician
Amy, RV Merchandiser; Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser w/ Banks & 2 toads