I’m not sure “remake” is the right term to apply to something like Gilligan’s Island. While there were several made-for-TV movies, they starred most of the original cast in their original roles. There was never a Giligan’s Island with new actors playing the old roles (assuming we disregard the three actresses that played Ginger after Tina Louise refused to participate). I think of these more as follow-on projects.
On the other hand, the Brady Bunch has had both follow-on and remakes - A Very Brady Christmas being an example of the former and The Brady Bunch Movie the latter.
- Rick