With AppGameKit it's not possible (at the moment) to use other then the first ASCII characters (32 to 127). If you want different fonts, then just use this:
http://forum.thegamecreators.com/?m=forum_view&t=189225&b=41 with royalty free fonts (not all fonts are allowed to be used without paying for them) or simply buy the new fonts from TGC.
Then in your program load the font image as new default one:
Global img_font as Integer
img_font = LoadImage("myfont.png")
SetTextDefaultFontImage(img_font)
Then you can use CreateText etc. which use the new font.