Statement I : GeF₄ and SiCl₄ act as Lewis bases.
Statement II : Ge and Si have d-orbitals to accept electrons

GeF₄ and SiCl₄ are acts as lewis acid. Since, in the above compounds the central atoms Si and Ge have empty d-orbitals in their valency shell
 

Statement - I is incorrect and Statement - II correct

Note :  represents first excited state