Yes, GOTHICS is a Scrabble word!

Letter values in Scrabble US: G 2, O 1, T 1, H 4, I 1, C 3, S 1.

Is it a valid word?

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

extinct East Germanic language of the ancient Goths; the only surviving record being fragments of a 4th-century translation of the Bible by Bishop Ulfilas
a heavy typeface in use from 15th to 18th centuries
a style of architecture developed in northern France that spread throughout Europe between the 12th and 16th centuries; characterized by slender vertical piers and counterbalancing buttresses and by vaulting and pointed arches

Also: black letter, gothic architecture.