GEMS--GIrls Excelling in Math and Science. GEMS (Girls Excelling in Math and Science) clubs were started in 1994 to encourage students, especially girls, to pursue education and careers in STEM fields, particularly technology, engineering and related high-paying, entrepreneurial enterprises. GEMS clubs strive to insure that a child sees themselves as a change agent or a problem-solver, a possible technology entrepreneur, engineer or a scientist, and as a person who makes a difference.