if it's a 99 2 door and it's factory painted dark blue, then it's an LS. 2 door GSR's only came in taffeta white, flamenco black pearl, milano red, clover green pearl, and super sonic blue pearl for that year (1999). however, there were 4 door GSR's available that year painted dark blue.

of course, if you get to check out the car in person, look for the VIN number, pop the hood and check out the motor, yadda yadda yadda. hope this helps.

btw, here's where i got the color info: http://www.team-integra.net/sections...?ArticleID=184