We investigate the fourth order generalized Ginzburg-Landau equation (GGLE) which can be widely used in hydrodynamics and nonlinear optics. There are three major ingredients. Firstly, bilinear form of the fourth order GGLE is obtained by means of Hirota method. Then we get the analytical soliton solution with different dynamic behaviors in two cases, corresponding to the constant and variable coefficients respectively. Secondly, some numerical simulations with near PT-symmetric potentials are carried out. When the potential is closer to conventional PT-symmetric potential, the nonlinear modes tend to unstable. But by increasing the value of imaginary part of potentials, It can be found that the amplitude of nonlinear mode is periodically oscillating. Thirdly, we consider the excitations of nonlinear modes and get some stable cases that have not been acquired in second part.