BASICS OF GAME PLAY FOR GUILD WARS 2

Guild wars 2 uses unique Levelling system: Dynamic level adjustment

Dynamic level adjustment adjusts a character's attributes and level based on the area they are in, either reducing them to match their current area in PvE, or increasing their attributes and levels (typically to 80) in WvW or Structured PvP. For example, in PvE, a character with an actual level of 50 in a level 10 area will have their attributes reduced to an "effective level" equal to a level 11 character (maximum level for the area +1). The effective level is shown as a green number next to a downwards arrow and the actual level on the experience bar and is stated under the actual level on the hero panel. Changes to attributes are also seen on the hero panel in green. Unaltered values for an attribute can be seen when hovering the mouse over that attribute.

When Entering World Vs. World your hero will be Upsclaed to lvl 80. But all gear that you have will will be same as in Pve maps.

when entering PvP you will be upscaled to lvl 80 also. In pvp your gear doesn't give stats, PVP is Skill based and not Gear based.