I've done a lot of search and can't find out what the andoe is a sealed or flowing gas co2 laser is. Any one have any ideas?

This page mentions tungsten for the annode.
http://www.eio.com/sealco2.htm

It was also my understanding that gas lasers had to have flowing gas because the electrons were stripped from the gas while lasing.

Its not just a case of having a bulb filled with gas. The actual gas must be thinly dispersed in the tube under a mild vacuum, but at the same time been replaced constantly. Having a gas laser is more than just having a light bulb, it requires lots of support equipment, unlike a light bulb.