Probably akin to gonu; an angle -- corner, quarter.
see GREEK gonu
a. an external angle, corner (German Ecke): τῶν πλατειῶν, Matthew 6:5; κεφαλή γωνίας, Matthew 21:42; Mark 12:10; Luke 20:17; Acts 4:11; 1 Peter 2:7 (פִּנָּה רֹאשׁ, Psalm 117:22 b. like German Winkel, Latinangulus, English (internal) corner, equivalent to a secret place: Acts 26:26 (so Plato, Gorgias, p. 485 d. βίον βιωναι ἐν γωνία, Epictetus diss. 2, 12, 17; (for other examples see Wetstein on Acts, the passage cited; Stallbaum on Plato, the passage cited)).