In tinycore 64 bit there are no UTF8 gtk2 terminals but we do have leafpad which is a gtk2 text editor.
repo version of gtk2 does not allow mulipress or other keyboard inputs.
This private update fixes that issue for anyone interested.
leafpad showing new kb input options
https://imgur.com/n1deoj9
Download files, source and build script here
http://www.mediafire.com/folder/hv3yskidhqsew/gtk2