For Goldmapsonline, orange indicates an active placer.
Yes, as this is a valid, current claim, permission from the owner IS REQUIRED.
Be sure to check what quadrant was staked as it only puts a square around an entire 160 acre area, whereas, claims are often 20 acres for individuals holding claims.
This can be done by clicking within the orange box.
Use the LR2000 from there if you feel inclined to contact the owner of the claim