Sea & Co Aviation Gulfstream G550 PS-GCE for the HTAI model.
These are textures only.
The HTAI Gulfstream G-V model is required.
It can be found at http://htai-models.com/downloads.html
The converted P3Dv4 model can be found here:
https://www.alpha-india.net/forums/index.php?topic=26276
Flightplans available here: https://www.alpha-india.net/forums/index.php?msg=434455
Two airports are missing in FS2004 for SBJH and SDIY. I will release AVSIM in ASAP.
Stuart