The VIN's are not exactly sequential, but are somewhat. My VIN ends in 200012 so it was somewhere around the 12th GTS built. It was built before the introduction at the 1996 Indy 500, in May of 1996. Actual build date Month/Day/Year is on the driver's door. I do know there were some VIN numbers higher than mine built earlier for some reason.
Rev Heat is trying to come up with a complete registry of 96 GTS Vipers so PM him your VIN and Mfg date if you have not already done so. Ask him for the 96 GTS info he has in a word file and he will be glad to send it to you.