GregTech for Minecraft 1.4.2, 1.4.5, and 1.4.6. Required Versions listed in each Release.
The Source Code in this Repository is from Version 276d.
More Details on the Release Pages
https://github.com/GregTech6/GregTech2/releases/tag/v4.2.20805
https://github.com/GregTech6/GregTech2/releases/tag/v4.5.28203
https://github.com/GregTech6/GregTech2/releases/tag/v4.6.29009