Linux Painting Software with features of Zoom-in, Show Pixel-Grid, Coordinates.

Hello!
I'm looking for a Linux Painting Software (something like MSPaint) which is having the features of Zoom-in, Show pixel-grid, Coordinates of Pixel of the current position in the drawing.
I've used MSPaint frequently for drawing driving directions maps, to create placeholder graphics, also for to the scale drawings like hexagonal maps, grid paper and other stuffs where coordinates help a lot.
Can anyone help me out on this?
Thanks!
