would you be kind enough to recommend a matching counter part

for photoshop's gradient map adjustment layer? 

I looked online and and found post that recommend Colorama

but the results are very different and it feels like an overkill (after numerous tweaks of course)

how should I convert this simple linear gradient

like this using this monster...?

it seems that if you are planning to do a color grading and move

later to after effects that you should avoid completely the use

of gradient maps because you would have to create it from scratch

am I right or am I right?