In the SG-1 episode "Fragile Balance" (S7:E03), a 15-year-old boy shows up at SGC claiming to be Jack O'Neill. The team determines that Jack was abducted and somehow reverted to a younger age. Later in the episode, they figure out that
the teenager is actually a clone of Jack, one who did not mature properly due to the technique used to create him. The clone takes the name "Jonathan" (as "Jack" is O'Neill's middle name) and decides to go back to high school, having a second chance to embrace the childhood he never had the first time around.
Has any Stargate-related material mentioned what happens to Jonathan after this episode?
I looked on the Stargate wiki but it only mentions the events of the episode. Then again, the wiki is primarily focused on the TV show and typically doesn't mention novels or comics. Given young Jonathan's knowledge & experience, one would think he'd be an ideal candidate for the Stargate or Atlantis programs in a few years' time.