When you stake $HECTA, the protocol give $gHECTA.
You can think of $gHECTA as your saving account: the $HECTA inside your saving account increases every epoch (apprx. 8 hours).
$gHECTA is the technical solution so we can reward stakers - contributors to the financial stable of the protocol.
Mathematically, you can calculate the number of $HECTA from $gHECTA by this formula:
No of $HECTA = No of $gHECTA * Index
Index
number is increasing every epoch depends on various factors, such as: the number $HECTA is staked, the revenue of the protocol.
You can use $gHECTA to vote on Hectagon Snapshot space and formula to calculate $gHECTA voting power is the same as the mentioned formula.
Can I sell $gHECTA?
$gHECTA is an ERC20/BEP-20 token so nothing can stop you from selling it. However, Hectagon does not support a Liquidity Pool for $gHECTA so it might be a bit inconvenient.