Yes, GELATINS is a Scrabble word!

Letter values in Scrabble US: G 2, E 1, L 1, A 1, T 1, I 1, N 1, S 1.

Is it a valid word?

GELATINS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a colorless water-soluble glutinous protein obtained from animal tissues such as bone and skin
an edible jelly (sweet or pungent) made with gelatin and used as a dessert or salad base or a coating for foods
a thin translucent membrane used over stage lights for color effects