Abstract The present work is the continuation of SPE 152309 "GaStim Concept - A Novel Technique for Well Stimulation. Part I: Understanding the Physics" and contains further experimental work and field pilot testing stages of the GaStimulation method already proposed by the authors. Systems studied correspond to quartz-arenites containing volatile oil and retrograde gas condensates exhibiting hydrocarbon permeability impairment under depletion. In such systems, treatment penetration and adsorption are key factors for benefit sustainment. Supported by the theoretical background and preliminary lab tests presented in part I, the second stage of the GaStim project was planned and executed covering the testing of additional chemistries, pilot well candidate selection and execution and results evaluation. Three field pilots are reported; A first one of induced water removal after frac by stand-alone gas injection; the second, where gas + chemical dispersion is injected to reach a condensate damage radius beyond 200 ft and a third one, corresponding to a volatile oil system in which asphaltene damage have been partially re-established at reservoir level by gas / solvent co-injection. In the first scenario, Sw reduction / Kg improvement is attained in the gastimulated area probably by coupled effects of evaporation and water slug displacement. For the condensate blockage scenario, it was noted that micellar type of surfactants exhibit the best performance when tested against IFT reduction capacity, Kg re-establishment and liquid bank re-mobilization. In this case, it was also observed that the tuning of chemical concentrations and deployment method are key to maximize hydrocarbon flow capacity and minimize surface back flow emulsion after Gastimulation. Finally and for the third scenario, it is noted that oil declination trend is positively changed after solvent + gas co-injection from a gas injector well. Further experimental work is planned to support modelling approaches both aimed on improving design criteria and expanding the potential of the technique into more challenging environments.