No, G Police doesn't mean that this game is full of cops with one pant leg rolled up, although they all do seem like they're on death row. This game is set in a domed city on one of Jupiter's moons, where several ruling corporations have let an underfunded and undermined police force maintain a modicum of order.
You are Jack Slater, a veteran war pilot who has joined the Government Police to investigate the death of his sister, who died under mysterious circumstances while serving on the force. You take up the controls of a gunship that is a meld of helicopter and V.T.O.L. (Vertical Take Off and Landing) aircraft and begin prowling the streets and low-ceilinged skies of the colony on a mission-by-mission basis. Tasks include scanning shipyards for illegal weapons, escorting and protecting ground team units, collecting and disposing of bombs, taking down enemy airships, and more, for a total of 35 assignments. As the game progresses, great-looking computer-generated FMV sequences debrief Slater on an escalating intercompany war, one that neatly ties into his own personal quest for vengeance.
The world of G Police is divvied up into numerous separate domes seen from a choice of configurable first- or third-person perspectives. These environments are loaded up as you travel through connecting passageways a la Resident Evil's door mechanic, although quite a bit quicker. The surroundings within these environments come into view slowly via an effect that is likely supposed to simulate searchlights, but that is more like watching a scene being built in front of you, such as in Aquanaut's Holiday and most PlayStation racing games. Of course, as an actioneer, G Police's explosions and gunfire compose a large part of its more impressive visuals, and they certainly are impressive, but don't really make up for the limited depth of vision. But control is definitely the most problematic point in the game. Though your ship can fly anywhere from ground level to the top of the dome, it's slow to turn around (which is hell in a fight) and never really moves as fast as you'd like, even when upgraded to a higher class later on. While these issues don't nearly make GP a bad game, they do prevent it from having speedy arcade-style play or, in effect, acting as a compelling action title.
It's true that G Police provides two full discs worth of gameplay, but the missions quickly seem like variations on a few basic themes, and the excitement never really builds, let alone climaxes. Fans of missions-based action games are probably better served looking up Sony's MechWarrior 2/Virtual On! hybrid, Armored Core, or Psygnosis' own space shooter, Colony Wars, both of which are much faster moving and a lot more fun.