This gundam paper model is a ZGMF-X56S/γ Blast Impulse Gundam, a Mobile Suit in the series Mobile Suit Gundam SEED Destiny, the papercraft is created by [unknown], and shared by yenc. There is also a simple version on the site: ZGMF-X56S Blast Impulse Gundam Papercraft.
The ZGMF-X56S/γ Blast Impulse Gundam is analogous to the Earth Alliance's old GAT-X105+AQM/E-X03 Launcher Strike Gundam. It is piloted by Shinn Asuka and later by Lunamaria Hawke.
The ZGMF-X56S/γ Blast Impulse Gundam is the ZGMF-X56S Impulse Gundam equipped with the γ Blast Silhouette pack and is designed for long-range heavy assault and bombardment missions. As such, the Blast Silhouette pack is equipped with heavy assault weapons in the form of two beam cannons, two railcannons and a pair of missiles launchers. The pack also contains a pair of beam javelin for close range combat, and has additional thrusters that enable the Blast Impulse to hover over earth surfaces such as water and improve its overall mobility. The Blast Impulse retains all of the Impulse's standard armaments, thus it can use a beam rifle and shield for ranged combat and defense respectively. The suit's VPS colors are different from that of the normal Impulse, and is now black, green, white and blue. [Source: wikia]
You may download this gundam papercraft here: