GSi is available under General Public License (GPL) v2

All source code, binaries, documentation, and other files in the distribution of GSi are subject to the following copyright and license agreement, unless otherwise documented:

/*
 * Copyright 2004-2009 Comat Technologies Pvt. Ltd.
 *
 *  This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 2 of the License, or
 *   (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program.  If not, see "http://www.gnu.org/licenses/".
 */