The use of computer software has good chance to form an efficient and powerful learning among the students. On the other hand, using open source software to teach mathematics in the school system of Malaysia, particularly in secondary school is still an uncertain issue. As a result, in an attempt to bring in a freeware, GeoGebra, this paper studies the attitude of form two students towards the utilization of GeoGebra in learning Loci in Two Dimensions. This study was conducted with 30 form two students from a secondary school in Johor Bharu district. In the beginning, GeoGebra was used to teach Loci in Two Dimensions and then followed by a survey. Questionnaires were provided to investigate the attitude of the students towards GeoGebra. A research model which was modified from the Technology Acceptance Model (TAM) was used to develop the questionnaires in order to study the students' attitude. Later on, the data were analyzed by using Statistical Packages for Social Sciences 19.0 (SPSS) software to find the correlation coefficient and regression results. The result revealed that the students showed positive attitudes towards the use of GeoGebra in learning Loci in Two Dimensions. At the same time, there was a significant relationship between perceived ease of use, perceived usefulness and attitude of students towards GeoGebra. This positive attitude of students will bring to positive behavioral intention to use GeoGebra in the future. At last, the implication of the research and recommendations for the future research also are discussed in this paper.