What does the 64th and final episode of Dragon Ball GT mean?

Wukong died when Super One Star Dragon confronted him.

Personally, I think Wukong died after taking away the huge energy ball that one-star dragon tried to destroy the earth, and then he used his spiritual strength to condense the last gas bomb to protect the earth. Later, the attack of one-star dragon had no effect on him, which proved this point.

In the last episode, the dragon realized his last wish and said, let's go. Didn't Wukong ask, "Is it time?" Vegeta was the first to be discovered. He said to Wukong, "Kakarot, don't …" Before he finished, Wukong hissed.

The following paragraph tells a lot of details. For example, Master Roshi found the tortoise fairy house when he passed it. He gestured with Xiao Lin, but after he disappeared, there was not even a footprint on the beach. Then in hell, Bick found out, and Wukong told him, "I will never forget you in my life"; Xiao Fang found Wukong's rags on the ground and didn't understand what was going on. Vegeta told her to keep them, and so on. There are indications that he is dead.

But I had a bad feeling when I watched GT, but I'm not sure that Wukong was lying on the back of the dragon, and those dragon balls began to enter his body one by one. I thought they had entered Wukong's body. Until the last four planets, Wukong suddenly disappeared, and then four planets entered the dragon's body, I discovered that those dragon balls actually did not enter Wukong's body but entered the dragon's body.

As for his youthful appearance after 100 years, you can understand that he has become an immortal, or that it is his soul.