Hi!
I have made some research and, for an interior, (but would be important to check the same settings for an exterior, to confirm wich one “matches” for both scenarios at the same time), the best thing is to set Sky Light as Satationary and not as Movable.
Gathered GI seems to not work properly, or to not bounce more than once, even if you increase the number.
And to light the interior by the exterior lighting you can: increase Sky Light intensity, decrese Sky light distance thresold, an/or use Brute Force GI with more than 1 bounces (the higher it is, the better).
@Rawalanche , is a good idea! Unfortunately almost all of my suggestions was unseen too 
Best regards!