Leakage power reduction is extremely important in the design of nano-circuits. Gate leakage has become a significant component in currently used nanometer CMOS processes with gate oxide structure. The structure and operation of the PAL-2P (pass-transistor adiabatic logic with PMOS pull-up configuration) circuits that consist mostly of PMOS transistors are complementary to PAL-2N (pass-transistor adiabatic logic with NMOS pull-down configuration) ones that consist mostly of NMOS transistors. This paper investigates gate leakage reduction of the PAL-2P circuits in nanometer CMOS processes with gate oxide materials. An s27 benchmark circuit from the ISCAS89 sequential benchmark set is verified using the PAL-2P scheme. All circuits are simulated with HSPICE using the 65nm CMOS process with gate oxide materials. Based on the power dissipation models of PAL-2P adiabatic circuits, active leakage dissipations are estimated by testing total leakage dissipations using SPICE simulations. The PAL-2P circuits consume low static power compared with traditional PAL-2N ones.