calling the guild window
 

Hello everyone, I was advised to contact you, can someone tell you how to call this window from lua, for a certain character.

This appears to be the block of code Blizzard uses to get that to open. Whether you can do it in an addon is another matter. You might need to track how Blizzard gets the relevant values up to this point to see if you can emulate them.

https://www.townlong-yak.com/framexm...Roster.lua#373