Grapefruit

I know fruit has too much sugar for me to be able to eat but I have found that my BG does not spike if I eat grapefruit. Has anyone else found this true for them? Are there any other fruits that don't have a major affect on BG? Everyone has to test around every kind of food, because generally speaking, we all react to things differently from one another. Much depends on gender, age, body size, exercise level, type of meds taken if any, portion sizes, and that's just for starters.