GMAT R2026a uses wxWidgets 3.2.9 as per [README](https://sourceforge.net/projects/gmat/files/GMAT/GMAT-R2026a/#:~:text=Acknowledgments%0A%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%2D%0AGMAT%20uses%3A%0A%2D-,wxWidgets%203.2.9,-(http%3A//www.wxwidgets)).
GMAT R2026a uses wxWidgets 3.2.9 as per README.