There have been a number of posts enquiring as to how to enable the GPS feature in a Supreme 20, with the standard response being “contact your distributor”. I did this, and was sent a copy of the AT SDK, which I already had. If I have interpreted previous posts correctly, this feature is inherent, but not enabled unless specifically supplied with this feature. I initially queried the module as per relevent posts,and the response indicated that the feature was not enabled. I purchased a Supreme 20 and a I/O USB GPS module at the same time, and would have expected this feature to have been enabled when I received the units. As I write this, it would seem that the distributor (Soanarplus) knows less about this product than I do, and I would prefer to be proven wrong about this, rather than have to pursue obtaining a resolution to this issue…