Amid continuing differences within Bihar's ruling Grand Alliance, Chief Minister Nitish Kumar's JD-U will attend the Parliament rollout of the GST but Lalu Prasad's RJD -- like the Congress -- won't.Senior Janata Dal-United leader and Bihar Energy Minister Bijender Prasad Yadav will attend the special Parliament session on Friday midnight.But RJD chief Lalu Prasad has announced that his party will boycott the meeting."RJD has supported the GST earlier but later it was found that the BJP-led government at the Centre has changed it. We will not be part of it," he said.