If your account is silver there is a method to get a free 1 month of gold. If you still need it I can link you to the places you will need.
I will see if I can find the full tut but here is the link you use on mobile: http://www.youtube.com/redirect?q=https%3A%2F%2Flive.xbox.com%2Fen-US%2FSubscriptions%3FCampaign%3Dgff-live-welcome-offer%26cid%3Dgff-live-welcome-offer%26ru%3Dhttps%3A%2F%2Flive.xbox.com%2Fen-CA%2FCampaign%2Fgff-live-welcome-offer%2FBillingInformation%26aru%3Dhttps%3A%2F%2Flive.xbox.com%2Fen-CA%2FCampaign%2Fgff-live-welcome-offer%2FBillingInformation&session_token=h8NHM-TSDAUNQxp_IiGvwvAzPXd8MTM4NTQ0MTYzNUAxMzg1MzU1MjM1
My apologizes. :: How to get free month of gold US ONLY If your account does not show you the free month of Gold, proceed to open Xbox.com in a new tab and scroll all the way to the bottom of that page. Now click "Mobile version" and it'll reload the site. Now visit the free one month link and it should show you the offer. Also, if you can't get this working...try a mobile device (clear the cookies and cache first) and it should work there. A private mode may also work for you. http://www.youtube.com/watch?feature=player_embedded&v=f13L4lp0Xw8 :: There is the tut for MrFlex25