query: Where is GMT Games headquartered?
passage: The General (magazine)
The General (1964–1998) was a bi-monthly periodical devoted to supporting Avalon Hill's line of wargames, with articles on game tactics, history, and industry news. It was the first professionally produced wargaming magazine for the nascent cardboard and hex-map wargaming hobby. Over the years the magazine was variously called The Avalon Hill General, Avalon Hill's General, The General Magazine, or simply General. It was headquartered in Baltimore, Maryland.[1] With the sale of Avalon Hill to Hasbro in 1998 the magazine ceased. Its unofficial heir was Operations Magazine published by Multi-Man Publishing to support the line of Avalon Hill games that remained in print, but that too went out of print in 2010, replaced by Special Ops magazine in 2011.
passage: Mattel
Mattel, Inc. (/məˈtɛl/) is an American multinational toy manufacturing company founded in 1945 with headquarters in El Segundo, California. The products and brands it produces include Fisher-Price, Barbie, Monster High, Ever After High, Polly Pocket, Hot Wheels and Matchbox, Masters of the Universe, American Girl, board games, and WWE. In the early 1980s, Mattel produced video game systems, under its own brands and under license from Nintendo. The company has presence in 40 countries and territories and sells products in more than 150 countries.[4] The company operates through three business segments: North America, international, and American Girl.[4] It is the world's second largest toy maker in terms of revenue, after The Lego Group.[5][6] In 2014, it ranked #403 on the Fortune 500 list.[7] On January 17, 2017, Mattel named former Google executive Margo Georgiadis as CEO.[8] Georgiadis stepped down as CEO of Mattel on April 19, 2018. Her last day was on April 26, 2018. Ynon Kreiz is now the new CEO of Mattel.[9]