The correct answer is option 4. GM was not followed by the Convention on the Elimination of all forms of Discrimination Against Women (CEDAW).

Let`s discuss each option to understand better:

Option 1: GM was indeed established as a global strategy for achieving gender equality by the United Nations. This means that it was recognized and promoted by the United Nations as an important approach to address gender inequality.

Option 2: GM was adopted in 1995 in the Beijing Platform of Action. The Beijing Platform of Action is a landmark international agreement that was adopted at the Fourth World Conference on Women held in Beijing, China. It outlines key actions and commitments for achieving gender equality and empowering women.

Option 3: GM requires a review of government policy in all sectors for eliminating gender disparity. This means that GM involves examining and revising government policies in various sectors (such as education, employment, healthcare, etc.) to ensure that they promote gender equality and address any existing gender disparities.

Option 4: This option is the correct answer. GM was not followed by the Convention on the Elimination of all forms of Discrimination Against Women (CEDAW). CEDAW is a separate international treaty that was adopted in 1979 and focuses specifically on eliminating discrimination against women.