What is the ruling on eating Turkish sweets containing beef gelatin, and are their slaughtered animals lawful, given that Turkey is an Islamic country?

If the gelatin is sourced from an animal slaughtered according to Islamic law (dhabihah) and its meat is permissible to eat (such as cows and sheep), then it is permissible to consume. However, if it comes from an unslaughtered animal, a carcass, or a pig, then it is impermissible. The general rule in Muslim countries like Turkey is that they ensure the permissibility (halal) of their slaughtered animals, so it is permissible to eat their slaughtered meat and sweets, unless proven otherwise.