You will need the whole kit ($149), not just the glasses. The monitor does not come with a transmitter. The link you provided though does link to a newegg page for the whole kit. That is what you'll need for 3D across those three monitors.
To further answer your initial question - no, you would not be able to do 3-way Surround with the PG278Q unless you have 3-Display Ports on your two graphics cards. You would need a 780 Tri-SLI setup, since most of the 700 series cards only come each with one DisplayPort. Converters will not work, as DVI and HDMI cannot output 144 Hz at 2560x1440p.
In a weird catch-22, G-SYNC and NVIDIA drivers *Currently* does not support 3-way Surround over DisplayPort in SLI (one DP per-card) anyway. Presently...