derived from the word GIMP- as in Bring out the GIMP!
Relating to something as GIMPTASTIC means that only a true GIMP would think that item/action is cool and worthy of belonging to/being performed by a GIMP!

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.

This is something someone with a limp would think is cool.

Refering to a gimpy. It can be use to describe anything that's lame.

a retard with no life of his/her own. Only friends with "cool people".