Don’t see why not!
I have a box of this stuff on the shelf: http://www.amazon.com/Knox-Gelatin-Unflavored-8-Ounce/dp/B007Y3HM5C
Not fancy, not organic… probably animal based.
Kraft/Nabisco makes it. I’m sure what ever you have available at the local grocery is pretty much the same stuff.
Some more info: http://www.livestrong.com/article/239995-what-are-the-health-benefits-of-knox-gelatin/