GEM is simple e-market place. As I mentioned, you have to self certify your product. For example, I could go on and upload my product in GeM under a particular category and when user would search for it, it would show up unless and untill user gives his/her specific input.Could be possible that trials may be needed. I have a friend whose products are listed in GEMs. He said once your product is in GEMs most of the trials are done for putting a tick in the paper. He said that the said products were thoroughly tested in other tenders before he was part of GEMs. After the same products were listed in GEMs there were not tested as much . As far as L1 is concerned, it was shared among contenders , which will likely happen in military too. No MOD babus will give a massive contract to one player, they will loose their leverage.
As you could see that I search for backpack and over here DRDO product did showed up. Armasen has yet to show up. May be they have uploaded in different category. But never the less, uploading here doesn't mean it was certified by user. But it means you are self certifying your product and this is subject to rejection at later stage based on user review in GeM.
GeM is been put forward to remove the missle man or in this case Babus. So being L1 in GeM depends solely on price basis. We are registered in GeM and we have to fight for 100 rs difference to be L1 for any prospective order. So its not a shared concept by MoD Babus as believed.