* It's not directly transferred: Most colleges don't simply add your old GPA to your new one. Your previous institution's GPA is part of your academic history, but your new GPA will be calculated *separately* based only on the grades you earn at your new college. Your new school might look at your previous GPA during the admissions process, but it won't be mathematically combined with your new grades.
* It's considered for admission but not calculated into your new GPA: Your previous GPA is a factor in whether you're admitted to the new school and may affect what courses you're allowed to take (e.g., they might require you to repeat certain courses if your grades were low). But your new GPA reflects only your performance at the new institution.
* Transfer Credits may affect your overall GPA: The courses you transfer will often be evaluated and may be counted toward your degree at the new school. However, the grades earned at the previous institution are usually *not* factored into your overall GPA at the new school. The new school will assign grades for the transferred courses only if there is a discrepancy in grading scales, but this won't change your originally earned GPA from the previous institution.
In short: Your old GPA is part of your academic record, but it doesn't directly influence your GPA at your new college. Your new GPA is calculated solely on the grades you earn at the new institution.