GASP is an open source platform that conforms the Open Mobile Alliance (OMA) v 1.0 specifications. It is able to handle basic services for building and handling interactions between players such as session management, communications... GASP is implemented in Java. It offers a server and a client part. It is defined for MIDP and DOJA J2ME profiles. GASP is demonstrated through Kouiz, a multiplayer game for mobiles presented in the second part of this paper. During solo phases of the game, the player tries to breed animals called kouizs. The aim is to improve their skills. With improved skills, kouizs have better chances to win against challengers in the multiplayer arena. In this mode kouizs can fight. This paper ends by discussing our current results and what we plan to do next with the gaming service platform GASP.