I created a gui wallet based on the sumokoin wallet:

reddit: https://www.reddit.com/r/Electroneum/comments/7ca8qw/electroneum_gui_wallet_pythonwin64/
github: https://github.com/XzenTorXz/ElectroneumGUIWallet/releases
screenshots: https://imgur.com/a/5UofF

When creating an adress from the wallet you cant recover it with the mnemonic seed! But you can use the wallet-files from the data/wallet/*.bin in the regular wallet-cli if you want to.