I am using Pro Motion and Grafx2 as well as Gimp. I'm still very new to pixel art and I have never made a gif animation. I see alot of great work here and I can not match up any of it to software. For the software I mentioned, what would be the best way to add gif animation? Also, are there any threads someone can link that discusses an animation workflow for pixel art?

If you provide a sample of your work, it will be easier for people to point you in the right direction.
In any case, no matter the program, be sure to get some basics on traditional animation. (At a minimum:  http://en.wikipedia.org/wiki/12_basic_principles_of_animation)
In terms of software, I can see 2 categories, single-layer or multi-layer.
*) Single-layer are more frequent. They are rather straightforward to use, because at any time T, there is only one bitmap, "what you see is what you get". It's what I implemented in Grafx2 (in 2.4 work-in-progress)
*) Multi-layer allow more complex "scenes" where different planes have different animation: for example a character on the foreground is performing a looping 8-frame run loop, while the background is scrolling (panning) at a speed of 2 pixels by frame. It's what Flash allows, for example,and it comes at the cost of complexity: just see how your image's timeline looks when several things move at several speeds:

In Grafx2? Unlikely. It's technically a big constraint to implement, and the function is overrated for most game graphics.
I mean, for high-resolution lineart where the outline's thinkness is negligible, onion skinning is as useful as in traditional animation : You work on a white canvas, individual lines have one screen pixel of thickness, Their color (lightness) clearly indicates which 'plane' they belong.

Now if you try with a character smaller than a Street Fighter character (let's say < 96px), outlines are much thicker relative to the character. Some lines or segments from two frames will overlap entirely, and it will difficult for the viewer to mentally separate the two. Stacking more than 2 or 3 frames produces a big visual mess that doesn't help.