The GM-A023 from Navisys is a GNSS Module with Frequency 1575.42 MHz / 1598.0625 to 1605.375 MHz, Accuracy 2.5 m, Navigation Sensitivity -159 to -163 dBm, Tracking Sensitivity -165 to -163 dBm, Acquisition Sensitivity -146 dBm. Tags: Surface Mount, Module. More details for GM-A023 can be seen below.