"Parliament should decide whether there should be democracy or dictatorship in this country. If we make mistakes, democracy should not be punished," he said.
Gilani repeatedly said he was not against any institution, including the judiciary and the military, and recalled his role in restoring the judges, including Supreme Court Chief Justice Iftikhar Chaudhry, who were sacked by Musharraf.
The premier warned the opposition PML-N that it would not gain from the ouster of his government.
In the past too, the opposition had not gained when the Pakistan People's Party's governments were removed through unconstitutional means, he pointed out.
Gilani said the ruling coalition would move a resolution that is aimed at strengthening democracy and parliament.
"The resolution is not against any institution, including the judiciary and the army," he said.
The opposition was free to make any changes it wanted in this resolution, he added.
Later, the resolution was introduced in the House by Awami National Party chief Asfandyar Wali Khan, a key leader of the ruling coalition.
With the session being adjourned for the Friday prayers, the National Assembly will vote on the resolution on Monday, officials said.