Sheikh Gilani is said to be close to the leader of Jaish-e-Mohammed, Maulana Masood Azhar.[i] Azhar used to lead Harakat ul-Ansar. He was released by India after terrorists hijacked an airliner in 1999 and demanded his release.
JEM primarily targets India but members have been accused of attacking Christians in Pakistan and having involvement in plots to assassinate Pakistani President Musharaff.
JEM has been listed by the U.S. State Department as a Foreign Terrorist Organization since 2001. The group is linked to Lashkar-e-Taiba, Al-Qaeda and the Taliban.
[i] Wilson, John. (2007). The General and Jihad. Pentagon Press.
