While I quite like the game within a game of figuring out technology in Gamma World 1e. It does leave something to be desired when playing online.
Here is an interesting read about using the tables in game
And here is what one of the charts looked like.
Here's my hack. It's a percentile roll to see if you can figure it out. (roll under).
All characters start off with a base chance of 15% at Level 1 to figure things out.
At 1st level if you have the following intelligence you can gain extra bonus to your base chance.
3 - 5: -5%
6 - 11: +0%
13 - 16: +10%
17 - 18: +15%
For every 3 levels gained you receive an extra 5% (Levels 3, 6, 9, 12 etc).
Best case scenario a level 12 mutant will have 50% chance of figuring out tech. Which is obviously half. For the most part this should make it a bit swingy in terms of being able to figure things out.
Sidenote (Because there always is one).
Here's a Gamma World Character sheet