gts: GTS (GNU Triangulated Surface Library) gts: gts: GTS stands for the GNU Triangulated Surface Library. It is an Open gts: Source Free Software Library intended to provide a set of useful gts: functions to deal with 3D surfaces meshed with interconnected gts: triangles. The source code is available free of charge under the gts: Free Software LGPL license. gts: gts: gts: gts: