It is difficult to determine whether a 100.68 weighted GPA is good without knowing more context. Depending on the grading scale and level of difficulty of the courses taken, a 100.68 GPA could be considered very good or average. For example, if the student is taking mostly honors or Advanced Placement (AP) courses and is achieving A's and B's, then a 100.68 GPA would be quite impressive. However, if the student is taking mostly regular level courses and is achieving A+'s, then a 100.68 GPA would be less impressive.
Ultimately, the best way to determine whether a 100.68 weighted GPA is good is to compare it to the average GPA of the student's peers and to consider the level of difficulty of the courses taken.