Yes, iTel S41 does support gesture controls.
Yes, iTel S41 does have the eye protection mode which reduces strain for long reading.
iTel S41 dimensions are 144 x 72.4 x 8.3 mm.
No. iTel S41 does not gorilla glass but it's display is scratch resistant.
Yes. In fact, iTel S41 has ring indicator which blinks when you get a new notification.