Gaber was detained in 2013 for allegedly promoting atheism, which can be punished in Egypt under a law that bans "insults to religions".
His website includes YouTube videos with titles such as "Criticizing religion is a human right," "Does God exist?" and "Evolution and religion are incompatible."
He also spoken out about sexual minorities, who face rampant government persecution and social violence in Egypt.
The IHEU, a London-based organization that describes itself as the "global representative body of the humanist movement," called for Gaber's immediate release.
“The rights of non-religious people to freedom of belief and freedom of expression are just as real and valid as the rights of the religious to their own freedom of belief and expression," the group's president Andrew Copson said in a statement.
"Egypt has been systematically violating those rights and we call on the Egyptian state to respect human rights, desist from its campaign against atheists, and abolish the ‘blasphemy’ laws which permit this hostile and unnecessary prosecutions, violating the defendants’ right to freedom of expression,"
Thank you for bringing this to the table zblaze..
It is sad and contradictory that Egypt is fighting a battle against radical Islamic terrorism and at the same time it's arresting atheists instead of cooperating together to eradicate the ideology of political Islam...