Authorities have discovered that the 26-year-old had no permission to be in the park and has over-stayed in Sarawak.
Marudi police chief DSP Gabriel Risut said Gaskell was now being investigated by the Immigration Department, Sarawak Forestry Department and MNP.
Gaskell was found by a search and rescue team on Tuesday after going missing in Mulu on October 20.
The Australian, however, plans to renew his visa, which expired on October 30, as soon as he leaves Miri General Hospital where he has been warded for observation.
He was dehydrated and in a weakened condition when found about 5 km from Miri Airport.
“I was supposed to fly back to Miri on October 24, but because of the incident, I could not renew the visa,” he told reporters in hospital yesterday.
“I plan to go to Brunei, have it renewed, and come back.”
The Borneo Post reported that the Australian plans to visit the Penan in Mulu.
Relating his ordeal in the jungles, Gaskell said he did not know there were search and rescue (SAR) teams looking for him.
“I was trying to walk out myself,” he said. “I was never going to give up.”
He had some food on the first day, nothing but river water for a week, then ate some “midin” (ferns). He took cover under overhanging rocks during the nights.
Gaskell said he reached Camp 4 in a bid to make it to the summit of Mount Mulu. It began raining and he stayed at the camp.
On the way down the following day, he became “confused” as there were “a lot of crossed trails, hunting trails and streams.”
He took one of the trails and got lost.
“Had I followed park rules, I could have avoided this incident completely,” said Gaskell.
He admitted he did not seek permission to be on the trail to Mulu and did not register with the Park authorities for a guide to take him around.
His father, David, younger brother, Ben, and friend, Brian Giles, were by his bedside at the hospital. David described it as “a miracle” that his son was found safe and sound.
Mulu assemblyman Gerawat Gala said Mulu guides are well-trained. MNP does not allow visitors to wander around on their own, he said.