Xsquawkbox is your pilot client which you use to log in to the network to fly.
Servinfo is just an online map display to show you whos online and where
btw dont confuse Xsquawkbox with Squawkbox. two different clients, Xsquawkbox is for Xplane, Squawkbox is for microsoft flightsim, you mentioned Plan G which is for MS Flightsim so ill move the topic to the correct forum
SimAir Force (SIMAF51/RCH51)
sCol Ernesto Alvarez (AMC)
436th Air Wing Commander