Commentary for Exodus 2:22

בארץ נכריה. The meaning of the name Gershom, i.e. a stranger in a distant land.

גר הייתי בארץ נכריה. A stranger in a land which is not my birthplace.

גר הייתי, "I was (used to be) a stranger, etc." The Torah deliberately phrases this in the past tense because the Torah reports events as of the time the Torah was written (at that time Moses could speak of his being a stranger in the past tense, whereas at the time the baby was born he was still a stranger in Midian). Alternatively, the words may be understood along the lines of Psalms 119,19: גר אנכי בארץ, "I am only a stranger on earth." Righteous people in this world are merely strangers, they have no permanent abode. Moses meant that ever since he was born he had merely been a stranger in a foreign land, seeing he had not been raised in his parents' home or shared his youth with his siblings.