what type of gas can I use

http://www.edmunds.com/pontiac/solstice/2008/features-specs.html? style=100996754 ---according to this if it's a non turbo model then yes regular unleaded but if it's a turbo it calls for premium unleaded(required)

Like dandyoun says, if it has 2.4L then reg gas is ok. If it's GXP Solstice w/2.0 then no. In fact use only 'top tier fuel' google that if confused. GXP is very nice car, if money for gas is an issue, drive less. Treat it w/respect & it will respect you back.