Gatineau forms, together with Ottawa and smaller communities, Canada's National Capital Region.
Its current flag is the following:
Until 2002, when it was merged with four other townships, it used the following flag:
Both flags use a stylized "G" and, in some way, represent sustainable development.
My attempt is a mix of both and, hope I, better than both:
The blue part represents clean water. The green part, whose shape may remark leaves in the wind, represents nature; it's also an arrow point towards future. The overall design resembles a "G" just like former flag.
A variant on same theme:
Another variant shows five stars, representing the five merged communities:
Comments and suggestions are welcome.
Sorry for recent absence. I had professional compromises.