How Do You Know if You Have a Big Gas Giant in Your Solar System?

If you're on the side of the moon in Jupiter that's facing Jupiter then you'd basically like your day would be split into too many days. Kind of like you would see the sunrise above your horizon but then it would dip behind Jupiter. Then when it come out of Jupiter and then it will sunset back to the horizon on the other side right? And the sunset could be pretty dramatic as well. You have like light bending around Jupiter. Like sometimes you see the red eye sometimes you wouldn't. It'd be pretty beautiful actually because Jupiter is a gorgeous planet. We do expect in other solar systems to see gas giants near the habitable zone. So it's possible they have moons in the