How do I use a shared variable to change the local PlayerGui?

In my game, I have a shared variable that needs to be used to change something in the local PlayerGui. The local PlayerGui (to my knowledge) can only be accessed in a local script, but shared variables can't be accessed in a local script, so I am stuck. Would appreciate some help.

Remove Events/Functions!!!! https://developer.roblox.com/en-us/articles/Remote-Functions-and-Events