Almost

SELECT * FROM gallery2 WHERE topic_id="776702" UNION SELECT * FROM gallery2 WHERE topic_id="705652" UNION SELECT * FROM gallery2 WHERE topic_id="1503661" UNION SELECT * FROM gallery2 WHERE topic_id="325443" UNION SELECT * FROM gallery2 WHERE topic_id="980948" UNION SELECT * FROM gallery2 WHERE topic_id="171462" UNION SELECT * FROM gallery2 WHERE topic_id="1822178" UNION SELECT * FROM gallery2 WHERE topic_id="1642881" UNION SELECT * FROM gallery2 WHERE topic_id="1375282" UNION SELECT * FROM gallery2 WHERE topic_id="614495" UNION SELECT * FROM gallery2 WHERE topic_id="1740465" UNION SELECT * FROM gallery2 WHERE topic_id="1488772" UNION SELECT * FROM gallery2 WHERE topic_id="1182615" UNION SELECT * FROM gallery2 WHERE topic_id="1511342" UNION SELECT * FROM gallery2 WHERE topic_id="854426" UNION SELECT * FROM gallery2 WHERE topic_id="661048"