Answer:
According to the octet rule, each atom required to complete eight electrons in the outermost shell of p orbital and s- and p- orbitals in an atom's outermost energy level are filled except some atoms. Gallium is one of the exception that does not follow octet rule.
Gallium is a chemical element having atomic number 31 and the electronic configuration of Gallium is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p.
The electron change needed to obtain an gallium octet by removing the 4p electron and form Ga+.