Gold Membership or (GM) is a Promotion which gives you bonuses and extras

With GM

+50% Exp and Money

+50% UC/R/VR/ER/L Rate

+20% Shiny Rate

+10% Credit Store Discount

GM Players will have a Yellow Name in the chat

You can buy Gold Membership from the Credit Store or from other players either in the trade chat or global market. Some achievements can give gold membership as prizes as well as Tournaments. You can also get GMs from Easter Eggs, Mystery Boxs or Christmas Presents. They cannot be dropped by pokemon.