This product probably ended up with the name 'Gobblestix' because 'turkey hot dogs' didn't roll off the tongue quite as well. The fact that it's an excellent turkey-based pun was just a bonus.
Hot dog sausages are a strange invention. They don't taste anything like as good as real sausages, but people snap them up as fast food anyway. The use of other meats as hot dogs has always struggled to catch on as an idea, and Gobblestix was just one of many snacks that tried and failed.