I generally don't for a couple reasons.
Most PCs and important NPCs will be Travellers, not locals. You might have been born on some backwater low tech super world or tiny rockball but you've spent more of your life aboard ships with standard artificial gravity.
Which is the second reason, technology trumps local conditions for the most part. Nobody living on that super world or tiny rockball is going to be a slave to local gravity, they'll live in habitats with artificial gravity unless the TL is too low. For the most part. Some may have to work outside of course, and some might not have the tech available.
I would no more expect characters to be adapted to local gravity than I would expect them to...
...be able to breath vacuum if they come from an airless world.
...not know how to use advanced tech if they come from a low tech world.
...have skin that can withstand corrosive atmospeheres if they come from some hellish world.
...etc. etc.
Of course, background can (should) be used to create colour and perhaps influence choices and effects...
...coming from an airless world might mean having Vacc-Suit-0
...coming from a low tech world might mean having a DM-1 for new high tech usage.
...coming from a hellish world might also mean Vacc-Suit-0.
...etc. etc. again
