Abstract: This paper introduces the Gaze based Interface Extensions (GInX) architecture designed for the development of eye-gaze enhanced attentive interfaces. The architecture is composed of 3 modules, the domain, user, and attentive modules. In the absence of information about the user and the domain, the attentive module controls the cursor using gaze and target position information alone. The cursor control can be refined in an attentive way [Vertegaal 2002] as more information about the application and the user are added. The system currently offers 3 different operation modes: Latency, MAGIC, and GInX default mode. In the Latency mode, the cursor position is controlled by gaze and selection is done using dwell time. MAGIC Pointing [Zhai et al. 1999] was suggested to combine the speed of eye tracking with the accuracy of manual pointing devices. GInX extends the concept of Magic Pointing by introducing information about the user and application context in order to eliminate the time required for cursor reacquisition and position adjustment inherent in the original MAGIC Pointing interface. A prototype of GInX was implemented and used to compared the performance of all these 3 modes with a mouse. Our experiments show that GInX outperforms MAGIC Pointing, although the mouse has the best performance overall.