You can use the same tools and workflow to create goals for nParticles and you use to create goals for Maya classic particles. Since goals are not part of the Nucleus architecture, they will not completely compensate for the wind and gravity attribute settings on the Nucleus node. If you want your nParticles to reach a goal exactly, turn on the Ignore Solver Wind and Ignore Solver Gravity attributes on the nParticleShape node. If you don't need your nParticles to reach the goal exactly, or if you like the look of the particles working against wind or gravity while trying to reach the goal, leave Ignore Solver Wind and Ignore Solver Gravity off.
To turn on Ignore Solver Gravity