It will mark the first time since terror suspects first arrived at the US naval base in southern Cuba nearly 13 years ago that a federal judge will hear a case about prison conditions and treatment.
US District Judge Gladys Kessler has rebuked the government's "deeply troubling" request to hold the trial behind closed doors.
In May 2013, at the height of an unprecedented hunger strike, President Barack Obama had asked: "Is that the America we want to leave our children?"
Among the 149 detainees still held there is Abu Wa'el Dhiab of Syria, who has been held without charge or trial since 2002 and was cleared for release in 2009. He has protested his detention regularly through hunger strikes.
He has filed suit to protest his force-feeding by Guantanamo handlers, using a tube inserted and removed inserted and removed for each feeding from the nostrils down the esophagus and into the stomach.
"He has made clear that he is in great pain."
In a dramatic order just days before the trial is due to begin, Kessler demanded Friday that the Obama administration release 28 videos showing such feeding sessions at Guantanamo Bay.
The videos show a so-called "forcible extraction team" restraining, intubating and force-feeding Dhiab.
Only five defense lawyers have watched the recordings so far.
"They are procedures in place that cause unnecessary pain, are not related to any legitimate security objective and there are ready alternatives that can allow it to be done in a more humane and less painful manner," Lewis said.
