What is the name of the island they were stranded on?

There was no name... it was an uncharted/unnamed/unknown island.

The actual filming location was the CBS studio back lot in Studio City, California.

here is a good link http://www.gilligansisle.com/tour.html

Deja vu?????

Deja vu?????

yeah, I noticed he posted the same question in like three threads so I am answering every time in case he only sees one.