Please answer a question about the following article about Hyderabad:

The Greater Hyderabad Municipal Corporation (GHMC) oversees the civic infrastructure of the city's 18 "circles", which together encompass 150 municipal wards. Each ward is represented by a corporator, elected by popular vote. The corporators elect the Mayor, who is the titular head of GHMC; executive powers rest with the Municipal Commissioner, appointed by the state government. The GHMC carries out the city's infrastructural work such as building and maintenance of roads and drains, town planning including construction regulation, maintenance of municipal markets and parks, solid waste management, the issuing of birth and death certificates, the issuing of trade licences, collection of property tax, and community welfare services such as mother and child healthcare, and pre-school and non-formal education. The GHMC was formed in April 2007 by merging the Municipal Corporation of Hyderabad (MCH) with 12 municipalities of the Hyderabad, Ranga Reddy and Medak districts covering a total area of 650 km2 (250 sq mi).:3 In the 2016 municipal election, the Telangana Rashtra Samithi formed the majority and the present Mayor is Bonthu Ram Mohan. The Secunderabad Cantonment Board is a civic administration agency overseeing an area of 40.1 km2 (15.5 sq mi),:93 where there are several military camps.:2 The Osmania University campus is administered independently by the university authority.:93

In what year did the GHMC form?
2007