Hi,
At the time of the post about SQ it was not possible to implement it in Sc2gears because replays did not contain enough info to calculate it.
Since then Blizzard improved the replay format and added the necessary info making it possible to calculate SQ from a replay.
It is not implemented in Sc2gears. Due to many reasons, Sc2gears was re-written from ground as a separate program. It is the successor to Sc2gears, it's called Scelight:
The Spending Quotient is already implemented in Scelight amogst with many other things (like SPM - Screens Per Minunte). I recommend everyone to switch to Scelight.