From the introduction:
GeneSys (General Roleplaying System) is a roleplaying system designed for easy use. Easy, that is, for both GameMaster (whom I will call GM from now on) and players.
GeneSys was designed when I was fed up with learning the umptieth exotic rule for doing always the same thing whenever I bought a new roleplaying game (RPG). It was meant to take what was best in my favourite system, to augment what I felt was lacking, and then to be grafted onto any game world I wanted to use.
In addition, GeneSys was meant to be easy to learn so that no tables or memorization were necessary. It should be understood rather than learned by heart. It should be able to deal with all situations arising in RPGs while giving preference to creativity and role playing.
GeneSys enables you to play exactly the character you would like to play. It does not restrict character creation in any way. GMs should, however, take precautions if they want to restrict power gamers who want to play all-powerful characters.
For the GM, the system should be easily adaptable to any existing game world. The keyword here is 'should'. In practice, the rules system of the game world may or may not be easily convertible to a percentile base as it is used in GeneSys. But with some practice and common sense it should be possible to reflect any and all rules using the basic set of GeneSys mechanics.
The major exception to this rule is the magic system. As magic is something entirely different from, say, riding a horse, different games reflect different ideas about magic. This is where most adaptive work comes into play.
First and foremost, have fun with it! GeneSys is intended to help you concentrate on roleplaying instead of mechanics.