The 2007 Pontiac Solstice GXP is not about what’s on the inside – it’s about almost 100 more horsepower packed in the lithe Solstice body. But for around $5,000 more than the standard Solstice, people expect special treatment, which GM handles with interior upgrades such as a special GXP instrument gauge; leather wheel trim and red seat stitching. As for the rest, think of the GXP as the performance version of the upper-trim Solstice, with power windows/doors, remote keyless entry, sport metallic pedals, premium sound and an available XM satellite/OnStar hook up.