Wamp is an installation package of an apache web server, of the PHP scripting language and of MySQL database (which is not needed for GuppY) for your PC running the Windows operating system.
The CEA, CNRS and Inria have thus developed CeCILL, the first license that defines in this framework the principles of use and distribution of free software while remaining in the spirit of the GNU GPL. GuppY is protected by the CeCILL license.