Hi AsustudentAZ,
I certainly agree with you about the lack of information about the many different types of gel materials that are available. The gel itself is a very high quality and non toxic material but there are many varieties of it as well. In general they boil down to gel mixed with different types of foam (mostly memory foam but others as well), pure gel materials (which is a great material but much more expensive), and buckling column gel materials such as intelligel and Orthogel (both licensed by edizone). Each type of gel has different benefits when uses as part of a material or as part of the overall layering of a mattress. There is a general but good technical data sheet about gel materials here.
Post #2 here and the posts it links to have more information about the different gel materials and some of my thoughts about them.
You can see my thoughts on Selectabed in post #9 here.
Phoenix