THIS IS NOT AN OFFICIAL METHOD, USE AT YOUR OWN RISK
Andre publicly stated the GUI wallet will not be updated for at least a few weeks after the v10 fork (if at all).
The easiest way to open your GUI wallet within the CLI without having to perform any restores is to simply copy the wallet file (Whatever you named the wallet upon creation which has no extension) AND the “wallet.keys” file (2 files total for each wallet you created) from your documents\electroneum\wallets directory (default windows location) to the directory you have the CLI.
Then start the daemond.exe wait for it to be fully sync’d, then start the cli exe and open the wallet using the wallet file name. Enter the password you set for it on the GUI and you’re in.
That’s in, you’re done.
*credit to @Crypto_Kangaroo for making me aware of this method. I’ve done it and confirm it works!