I can't see any grain properties in those pictures.

From just the color, some looks like poplar. If it was painted, I'd say definitely poplar.

Cannot advise on gel stains. Just a modified paint, as far as I am concerned.

It is going to be problematic to get an even color with all the different wood colors in that table.

I second poplar. Its a paint grade wood.

Poplar

I would be surprised if it was anything but poplar. The grain pattern and oatmeal, green, and gray colors are all typical of poplar. while it is often painted, it is also often stained to "resemble" more expensive woods such as cherry and walnut. In this respect, it is often used as a secondary wood such as mostly hidden frame members or feet.

While you can successfully color it, it is quite prone to blotching with consumer grade stains like Minwax.

Poplar is dead cheap wood. I suggest getting a piece of it, sanding it to the same grit as you have done the table and test out your stain and finish before committing products to your table.

I could be talked into poplar based just on the green colour, but I'd have to know for sure that the green doesn't age to brown when it's painted, because it does when exposed to light. It is interesting that half looks brown, half green. Could the green come from anything you used to do the stripping?

I wouldn't sneer at it even if it is poplar. We used poplar door mouldings in our kitchen some 16 years ago and haven't decided on a paint or finish yet (it's a work in progress!) and I have to say they look pretty good. The wood has nice character, nice warm honey colour with darker brown shadings (light parts are almost identical to adjacent fir and pine), tight grain, good stability, pleasing grain pattern including its variations; really, it's easy on the eyes. Just because it's commonly painted doesn't make it bad. If it doesn't take your stain well, there might be a good result from just clear-coating it or varnishing - if you don't like the green you could let it age to brown first (if you're not in a rush :-)).

KarinL

Half of it is brown because I had only completed stripping half of it.