Long-time Walt Disney Co. board member Gary Wilson resigned his seat effective Monday, the company announced. Wilson has been on the board since 1985 and was required by the company’s corporate governance guidelines to submit a resignation at the end of 12 years of continuous service and then again every three years. Wilson, 65, is a former chief financial officer for the Burbank company. Wilson also is chairman of Northwest Airlines Corp. and serves as a director of CB Richard Ellis and Yahoo! Inc.