game-editor.com

is there a way to load external TMX tile maps? or any format for that matter or would i need to build them in GE directly.
im assuming tilemaps work anyways

You have to either load tilesheet's that you would break down to individual tiles or seperate images for each tile add them as animations to an actor then use gE's built in tiling or tile them by hand or build your own mapping engine given gE's tiling system makes tiles which are more like static images and doing them by hand or making a mapping engine means every tile is an actor both methods have their pros and cons