No. iTel S41 does not gorilla glass but it's display is scratch resistant.
Yes, iTel S41 does have the fingerprint sensor.
Yes, It does have.
Yes, iTel S41 does have the eye protection mode which reduces strain for long reading.
Yes, you can use 2 different WhatsApp accounts in iTel S41. Not only that, you can use 2 different Facebook, Instagram and Twitter accounts as well.