the malibu and g6 share the same platform, so id say no.
Not only do the Malibu and G6 share the same platform, but there's a TON of G6es on the road, at least in my part of the country. They'll all need parts for a good while.
This morning I was stopped at a light in my 6 and realized there were two others stopped beside me, first in line at the light. I swear everywhere I look I see a G6 now since I bought mine a month ago.
2009 Pontiac G6 Sedan - Ecotec 2.4L I4, 6-speed Auto, Sun & Sound, Performance Red, 15k miles.
2002 GMC Envoy SLE - Vortec 4.2L I6, 2WD, 3.42, G80, T/C, Indigo Blue Metallic, 125,000 miles.