Request for GEM authorization number

Request for GEM authorization number
I am Shailesh Apkar, from, Mumbai ,Maharastra- India. We are dealing in computer hardware and software. Now also we are willing to deal in with DELL brand for Desktop Computers and Laptops and accessories. I'm also filling the  various Government Tender and its required the authorized letter from company. 
But I want to sell items through the Government eMarketplace (GEM) portal. I have no GEM ID also. But I need reseller or partner certificate from GEM so that I can add product on GEM portal.