In G.P.S., the player plays the role of the head of State or government (president, monarch, prime minister …) of a country he has selected at the beginning of the game, and may intervene in all the following fields: the economy, social issues, the military, the Home Office and the Foreign Office, ecology, culture, etc. Every country in the world is featured along with its characteristics and own specificities.

• “Free mode”: the player's objective is to remain in power as long as possible and to further his influence throughout the world.
• "Scenario" and "missions" modes: these offer different game contexts featuring various issues: new elections, environmental issues, army invasions...
• "Wargame" mode: several players (up to 16) confront one another online in the course of military campaigns taking place in real time. This mode is also available in solo gaming.