The G-Cat 5.0 is a recreational sailboat, built predominantly of fiberglass. It has a fractional sloop rig with a fully battened mainsail, a rotating mast and all-aluminum spars. The symmetrical hulls have raked stems, vertical transoms and transom-hung, kick-up rudders controlled by a tiller. The boat has a trampoline for the crew, with an optional second one forward of the mast that can be used as the base for a tent for overnight accommodation. The design has no centerboards or daggerboards, relying instead on deep "V"-shaped hulls with a rockered shape to prevent leeway. The boat displaces .
