I made a tool that automates the placing bordered tiles in the GM room editor, which can be a tedious process. The tool modifies the room file itself, so you can still edit the room once the tool does its work. More info is in the readme. I hope people find this tool useful!
DownloadNote: This tool is for GM:Studio only. I might one day add 8.x support. For the reason why, open this spoiler tag.
Q: GM 8 / 8.1 support?
- A: The way GM:Studio stores the project data (as XML files) makes it convenient to make a tool like this. GM8 stores everything in a binary format, and while the tool Gmk-splitter could be used to make a GM8 conversion process, it would be messy and I didn't feel like implementing it. Also, the community will be migrating to Studio and YoYo's engine (I hope!). If you're a creator and you haven't switched yet, consider this a nudge!
--- version 1.0 11/21/2015 ---
Initial release!