The formula for gravitational potential energy is:
PE = mgh
where PE is the gravitational potential energy, m is the mass, g is the acceleration due to gravity, and h is the height.
Substituting the given values, we get:
PE = (65 kg) x (9.8 m/s^2) x (35 m)
PE = 22,715 J
Therefore, the gravitational potential energy is 22,715 joules (J).