To use Spine animations with GameMaker, you need to ensure that the version of Spine you are using matches the version supported by GameMaker. Currently, GameMaker supports Spine version 3.8. If you use a newer version of Spine, such as 4.0 or later, you will encounter compatibility issues, and your animations may not work correctly in GameMaker.

Here are the steps you should follow:

1. Check GameMaker's Supported Spine Version: Confirm that GameMaker supports Spine version 3.8.
2. Set Spine Editor to the Supported Version: Change your Spine Editor version to 3.8. You can do this from the Spine settings dialog as shown here.
3. Export from Spine: Export your animations from Spine 3.8.
4. Import into GameMaker: Import the exported files into GameMaker.

If you have already created animations in a newer version of Spine, you will need to downgrade your project to version 3.8. This can be done by exporting your project to JSON and then importing it into Spine 3.8, but you may need to manually edit the JSON to ensure compatibility.

For more detailed guidance, you can refer to the following resources:

• Spine settings for version control
• GameMaker's documentation on updating Spine sprites

Kobaldsky Please note that we do not officially provide a runtime for GameMaker, so if you have questions about the GameMaker side of things, it is better to ask them in the GameMaker community than to ask us: https://forum.gamemaker.io/

And as Spinebot already answered, as far as we know, the version of GameMaker that is supported is still up to Spine 3.8.