You can sometimes find user-made scripts on GitHub. These are free, but they require technical knowledge to install. They also break frequently because GoodGame Empire updates its code every few weeks.
offer "professional" suites with modules for multi-castle support and storm attacks, though these are rarely truly "free" for full features. Critical Risks and Warnings Using any automated tool in Goodgame Empire goodgame empire bot free
If you want to automate your gameplay, look for the free trial of a reputable paid bot (like Bot4GGE or AutoEmpire). Use the trial to supercharge your resources for a day, then turn it off. For long-term safety, stick to the mobile app and manual play. You can sometimes find user-made scripts on GitHub
If you cannot afford a paid bot (which typically costs $10-$20/month) but are tired of manual grinding, you don't need to cheat. Here are advanced, legal strategies to automate your play using in-game mechanics and browser tools that do not violate the ToS. For long-term safety, stick to the mobile app