When stated the lower 49 states on a GPS are they talking about US?

When the term "lower 49 states" is used in the context of GPS navigation, it is indeed referring to the United States. The United States is comprised of 50 states, with the 48 contiguous states located in North America and the 49th state, Alaska, being separated by Canada. The 50th state, Hawaii, is an archipelago located in the Pacific Ocean.

Therefore, when a GPS device refers to the "lower 49 states," it is excluding the state of Alaska and the state of Hawaii. This terminology is commonly used for various purposes, including route planning, weather forecasting, and geographic referencing.