  We report the preparation of Bose-Einstein condensates (BECs) by integrating
laser cooling with a grating magneto-optical trap (GMOT) and forced evaporation
in a magnetic trap on a single chip. This new approach allowed us to produce a
$6 \times 10^4$ atom Bose-Einstein condensate of rubidium-87 atoms with a
single laser cooling beam. Our results represent a significant advance in the
robustness and reliability of cold atom-based inertial sensors, especially for
applications in demanding field environments.
