This is the GURPS Ultra Tech rules reference for Gecko Adhesive:
Gecko Adhesive (TL9)
Sticky adhesive based on gecko setae (feet hairs). The pads have millions of tiny artificial hairs, covered by a protective coating. A small electrical pulse from an included wand causes the hairs to extend or release. A one-squareinch patch can hold 800 lbs. indefinitely in any environment, including in the vacuum of space and underwater.
$0.10 per square inch for double-sided pads, and $1 per foot length of 2” wide single-sided gecko tape.
However, this tech is so obviously useful that the Dominion uses it all the time. It doesn’t require power to operate, only to change state.
It forms a standard component of of Vacc Suits, used on the soles and also on the palms and even knees, elbows and buttocks on some models.
Many spacers wear Gecko-soled shoes as part of their regular footwear.
It is used on tether lines, on the landing gear of spacecraft and machines such as fork lifts and cranes. It is also used in numerous commercial building applications, detention facilities and sex dungeons.