Magazines come ... magazines go ... just look at the volume of UK mags that were cancelled or merged into other titles within only 1 - 3 years ... Personal Computing Today, Games Computing, Computer Gamer, Atari ST Review, SNES Force .. the list goes on.
So while it is disappointing that Gamepro has folded it might be better to actually celebrate how long it lasted instead? As 22 years sounds like a pretty darned good run in my eyes.