1. Export your session keys from your existing Element client, give a good password and remember it
2. Copy the keys file to some location where gomuks can access them. Keep in mind that the're encryption keys - handle them responsibly, delete them with shred after use.
3. Import them into gomuks with the /import <filename> command (to be entered into the message field - like in the old IRC times) You will be asked for the password.
4. Quit gomuks with the /clearcache command
5. Start gomuks again

1. Mouse support needs to be disabled, as it won't work and flood you text inputs with escape sequences (it worked pretty well without screen for me)
2. Something xterm-based needs to be used for $TERM to handle Ctrl-Up and Ctrl-Down correctly

vi screen-gomuks.ti
tic screen-gomuks.ti
TERM=screen-gomuks gomuks

screen-gomuks.ti

screen-gomuks,
  use=screen.xterm-256color,
  kmous@,

Credits: Actually, the terminfo part was suggested by ChatGPT. However, regarding the Ctrl-Up Ctrl-Down part, it was impressive good on pretending to be an IT expert chatting with some other (i.e. me), but did not come up with a working solution.