[bristleworm]

This depends on the exact license they chose. https://www.cgal.org/license.html states that they use both GPLv3+ and LGPL. And they even offer a commercial license. I'd contact them and ask just to be sure. There's a mail address in the third paragraph.

[huxingyi]

Thanks, I mainly use the CGAL/Polygon_mesh_processing to do mesh boolean. I saw some thread say CGAL commercial license cost $12K, it's not affordable for a side project yet.