I cant find proper Gr2d screen can u help me

Begin by reading the following section of This Guide.

I just quote the preliminaries. Scroll down the page for information of detecting your hardware and locating the proper drivers.

[3.0.0] MapleStory

[3.1.0] MapleStory Errors

[3.1.1] "Failed in finding proper screen mode for Gr2D"
This section would be helpful to you if:

--> you have reinstalled Windows recently on your computer;
--> you have never played MS on your computer before;
--> you are trying to run MS in a virtual machine (jump to [3.1.1.6] now);

This section does not apply to you if:

--> MS worked on your computer before but you have not reinstalled Windows between now and the previous time it worked;
--> MS worked on your computer before but due to a patch or a GameGuard update, it no longer works;

If the last two applies to you, I suggest you do some universal fixes right now: reboot, reinstall the client, redownload and reinstall the client, system restore to an earlier point where it does work, and/or email Wizet (but make sure you mention that MS worked previous to a patch or whatever event that made it not work). It also wouldn't hurt to try these sections, but you will have a lesser chance of getting it to work compared to the people these sections are written for.