gfx2pce [options] png/bmp/pcx/tga filename ...  

where filename is a 256 color PNG, BMP, PCX or TGA file

• -gb Add blank tile management (for multiple bgs)
• -gs(8|16|32|64) Size of image blocks in pixels [8]

• -m! Exclude map from output
• -m Convert the whole picture
• -mp Convert the whole picture with high priority
• -mn# Generate the whole picture with an offset for tile number where # is the offset in decimal (0 to 2047)
• -mR! No tile reduction (not advised)

• -p! Exclude palette from output.
• -pc(16|128|256) The number of colors to use [256]
• -po# The number of colors to output (0 to 256) to the filename.pal
• -pe# The palette entry to add to map tiles (0 to 16)
• -pr Rearrange palette, and preserve palette numbers in the tilemap
• -pR Palette rounding

• -f[bmp|pcx|tga|png] Convert a bmp or pcx or tga or png file [bmp]

• -n No border
• -q Quiet mode

gfx2pce -po16 -gs8 -pc16 -pe0 -fpng -n -m -gb myimage.png

This will convert a myimage png file to a map/pal/pic files with 16 colors,palette entry #0, 8x8 tiles, a blank tile, a map, no border, 16 colors output.