For the kosher consumer, gelatin must indeed be kosher.
As in all questions of kosher, there are different standards applied by different authorities, and one should consult one’s usual authority if a question arises.
...The question is: Can gelatin from non-kosher sources be permitted? Although cows that were not ritually slaughtered, and, of course, pigs, are certainly not kosher, some rabbis were lenient in allowing products that had very small amounts of gelatin added. This is because they felt that the gelatin extraction process caused the skins and bones to be sufficiently denatured, to the point that they are no longer considered food.
This is not the mainstream position. It has been rejected by every major kosher certifying agency. Indeed, equipment that processed gelatin products might need kosherization, depending on the nature of the contact between the equipment and the product...
You’re welcome to your opinion. My original comment was specifically directed to muslims asking about ice cream. Careful reading is a valuable life skill. Look into it.