Guild Wars 2

Do i need to explore the whole wvw map to get the gift of exploration ?

Nope. Was removed in a patch a while back. Enjoy!

EDIT; more specific, you don’t need ANY wvw completion. Same goes for Dry Top, Silverwastes and Southsun Cove, not needed. Those zones do provide level 80 map completion rewards though so feel free to complete them too if desired.

World completion requires completing all the following maps:

All six cities.
The 25 explorable zones, except Southsun Cove and zones in the Maguuma Wastes
The Chantry of Secrets.

The following areas do not count towards world completion:

Dungeons.
Hall of Monuments.
Edge of the Mists and Obsidian Sanctum.
Heart of the Mists and any Structured PvP areas.
Explorable zones that were added after the release of the game, such as Southsun Cove, and the zones in the Maguuma Wastes.
All maps in the Heart of Maguuma region, added with the Heart of Thorns expansion.
Claw Island, as it is a story instance only.

- https://wiki.guildwars2.com/wiki/Map_completion