The electron configuration of germanium ion (Ge2+) is:

1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^2

In neutral germanium atom, the atomic number is 32, which means it has 32 electrons. When germanium loses two electrons to become Ge2+, it results in the removal of two electrons from the outermost energy level (4p), leaving 30 electrons in the ion.