Name "genderqueer" applies to all persons who do not identify themselves as strictly male or female. This may mean having an indefinite gender, more than one gender or no gender at all, or having a "third gender" different from both male and female (itself not necessarily named), or having a changeable gender identity which fluctuates between male and female identities. Alternate name for all these identities is "non-binary." Tomislav Todorović, 5 June 2015 Source: Wikipedia page about genderqueer identity
This flag was created by Marilyn Roxie in 2011. The description of its symbolism is given here.
The flag is a lavender-white-green horizontal tricolor. Lavender color is a mixture of blue and pink, which are traditionally associated with men and women, respectively, so it represents androgyny. It also represents "queerness," with which it was associated for a long time. White stands for agender (genderless) identity. Dark chartreuse green, the particular shade used in this flag, is the complementary color of lavender and stands for all identities which are defined outside of and without reference to the binary (male/female).
Some time after the flag design was published, it was subject to suspicions about its origins due to the similarity of its colors with those used by the United Kingdom suffragette movement. The detailed clarification of the issue, which reveals that the similarity was entirely unintentional, can be read here. The flag was used, together with the rainbow LGBT flag, during the opposition protests in Moscow on 4 February 2012, as can be seen here and here. It was also used at the pride parade in Madurai, India, on 30 September 2012, as shown here. Tomislav Todorović, 5 June 2015
The flag came into more widespread use in the late 2010s. A list of examples follows:
The genderqueer pride flag has originally had lavender at the top, green in the middle and white at the bottom. The meaning of colors was the same, as stated
here. This version of the flag was created in 2010, to be replaced with the current one in less than a year, and seems not to have been used in real life during that time. Tomislav Todorović, 5 June 2015