The Pontiac brand is kaput. Anyone who says otherwise is blowing smoke up your skirt. Yes GM still maintains a website for the brand (they still own the rights to the brand), but you cannot buy a 2013 Pontiac. Here is the current lineup, on GM's website:
Pontiac (from Wikipedia)
Pontiac was an automobile brand established in 1926 as a companion make for General Motors' Oakland... On April 27, 2009, amid ongoing financial problems and restructuring efforts, GM announced it would discontinue the Pontiac brand by the end of 2010 and focus on four core brands in North America: Chevrolet, Buick, Cadillac and GMC. The last Pontiacs were built in early 2010, with the final dealer franchises expiring October 31, 2010.
The Pontiac brand was pulled after the 2009 model year in Mexico and the brand was renamed Matiz, selling only one vehicle, the Matiz G2 (Matiz's logo is similar to Pontiac's).
The last Pontiac, a 2010 G6, was built in early 2010 when GM restarted the Orion Assembly Line to manufacture one final 2010 Pontiac G6, after the earlier G6 line at Orion and the Wave/G3 line in San Luis Potosi were shut down in November and December, 2009 respectively. This was most likely done purposely so GM could show that the final Pontiac ever manufactured (and the only one ever manufactured in 2010) was at an American plant.
Pontiac became the second brand General Motors has eliminated in six years. Oldsmobile met the same fate in 2004 after being more slowly phased out over four years. Pontiac also became the ninth North American automobile brand since 1987 to be phased out, after Merkur, Passport, Asüna, Geo, Plymouth, American Motors (AMC) (renamed Eagle in 1988, only to be phased out a decade later), and Oldsmobile.